Absolutely love your videos. I could sit here and watch you perform autopsy’s all day on broken/failed mechanical items. You do such a great job explaining things and asking the questions I myself am thinkin in my head. So cool Mustie. Always love you’re videos.
Back in the 1970's and early 80's, home mechanics was a nightmare- there were no battery operated impact wrenches, or any other tools available to the home diy'er like there are today-and so I used to get so pissed off at not being able to remove certain screws /nuts/bolts etc because the motor manufacturers made it impossible for us to do our own servicing! Thank goodness we have these tools now, (oh and guys like you to show us how-that's just the best bit- even though now my car is a lease one so even a flat tyre is their problem)
I noticed during your latest test that the power steering was working great and no leaks, but there was something leaking out of the multi-black hoses right above it. Your channel is the best. I'm hooked.
Being a mechanic for 40 years I’ve replaced a bunch of ps pumps but never took one apart. Thanks to you now I don’t have to 🤣🤣thanks for the entertaining videos.
What normally goes bad is the bearing-- and once the bearing goes it causes the seal to get wallered out and leaks (as yours was doing). Also, the tension of the belt now pulls the shaft out of alignment since the bearing is too far out of spec and that causes all the machined surfaces of the pump to impact and chew each other up. It's a pretty cool design in that: all the wear surfaces are replaceable; I can see why the core has value now.. The weak link is the bearing though- and the tension of the belt always pulling sideways on the shaft/ especially at higher RPM's and higher acceleration. lol
As I understand it, there is a fundamental difference between an automatic transmission and a power steering system, which is that the former contains clutches and the latter doesn't. Therefore, automatic transmission fluid can be too slippery, causing the clutches to slip, where power steering fluid is as slippery as possible.
@@alan6832 ATF and power steering fluid definitely are not the same. ATF is pretty benign as a fluid, but power steering fluid will destroy everything. It infiltrates and balloons rubber, eventually causing it to liquefy and fall apart. It also chews up belts and destroys paint. If you got ATF in your power steering system, nothing bad would immediately happen. However, vice versa power steering fluid in an automatic transmission... stick a fork in it, it's done.
@@GGigabiteM Have you guys ever heard of, like, a workshop manual or manufacturer's recommendations? They always tell you what fluid to put where! Toyota's power steering systems tend to specify Dexron ATF, if I'm not terribly mistaken.
@@celeron55 Your entire comment shows you're an armchair mechanic with no wrenching knowledge. I have a truck outside right now where I had to make my own diagrams for almost every system because the factory Mopar diagrams either don't exist, or are completely wrong. And this is a stock unmodified truck. I've also worked on dozens of cars where the same was true. The locations of things weren't marked, or were incorrect. And if you blindly trust them, it would have caused thousands of dollars of damage. And with today's companies becoming increasingly anti-repair, good luck finding diagrams or even parts. Tesla doesn't want you working on your own vehicle, will not sell you parts, and will blacklist your car's VIN if they detect unauthorized parts attached to your car if you tried to replace something to repair it yourself.
It's funny how watching these videos can change your whole outlook. I'm no mechanic but, before my health deteriorated, I 𝒎𝒊𝒈𝒉𝒕 have tackled the pump replacement. Like many folks though, it would have been a kinda daunting prospect. Watching Mustie change them over, this seemed like a really, really straightforward job. It dawned on me that I watch so many videos of similar work, that I'm used to seeing folks dig far deeper, rather than just changing one component. So often, multiple components have to come out, just to reach the part you're after. In many videos, the whole engine gets pulled, so a p.s. pump seemed so easy by comparison. Funny how getting more familiar with this kind of work can change the way we think, or is it just me?
I've been a "shade tree" mechanic 20+ years... even a few years as running an actual shop and sometimes i still look at jobs and think oh boy here we go, think this looks like a lot or even doubt my ability sometimes still. Especially on a customers or a friends car. Honestly i think it keeps me on my toes lol. Checking my work multiple times. or a seemingly routine job i will check the procedure for that particular vehicle just to make sure. Which has saved many times. I am Always nervous about timing belts on interference engines even though I've probably done over 100 of them. Check marks rotate engine 3 times check marks again. rotate a tiny bit backwards check belt tension. rotate 3 more times check it again Etc lol. I messed up one time and knew it right away. Such a bad feeling to know i just caused over 1000 dollars worth of damage in seconds that could have been avoided. Thanks for reading! If you are still with me I Hope You Are Having A Great Day ! And I Hope You And Your Loved Ones Are Safe, Healthy And Happy!!
@@bentboybbz I worry just as much as you do. I think this is what keeps you from messing up. My colleagues often get overconfient, lazy, aloof, and I think this keeps them from asking questions. Questions like, will it seal, is changing only this part enough, what is the cause, will it work this way? etc. Every car should be treated as the most important thing currently. Changing the timing on my first car, knowing it was a non interference engine, I still turned it over at least 15 times I was so worried. Cheers to you as well!
I remember rebuilding my power steering pump on my old 2002 Toyota I had forgotten about that watching your video sent me down memory lane. I just rebuilt mine as a precaution because I had it apart
Some thoughts from a retired transmission builder: That is a 'vane type pump'. The ONLY way that pump can become scored is from a loss of oil for a given length of time. I noticed that one of the lines to the pump has a very tight radius, and this might have created a restriction to flow. Over time, this could starve the pump, and starvation made worse if any fluid has leaked out of the system. There could also be a restriction elsewhere in the system which would create a situation for pump cavitation, which would also cause the pump to fail. Possible that the flexible hose has delaminated inside and is serving to plug off the flow. There should be a pressure relief valve somewhere in that system that regulates the entire system pressure. Otherwise, these vane pumps are known for both high pressure and high volume and are prone to failure if sufficient pressure and fluid volume are NOT present. Look for any inline filters that may well be blocked, because there has been serious fluid contamination with fine solid matter that may serve to destroy your new pump! You don't need/want that - either!
@@chadmckenzie7454 yeah, I bet his screen is near plugged and I don't think he cleaned it. Quick google search would've helped, but maybe he just didn't film it.
ive had a similar experience in my 2007 Tundra 4.7L V8 after doing some hot dogging around in the mud. My question is this, do you think it has caused any damage to the rack & pinion? Also is there a factory filter somewhere in the Power steering system that should be changed after a situation like this?
I just went through all of this with my Toyota pick up, 310k miles. My pump was getting noisy, I think actually because the screen in the reservoir was near completely blocked with 30+ years of debris. Replaced pump with a reman and disassembled old, original Denso pump and could find no obvious damage and little wear. Very impressive. It's quit possible that what caused the noise chirping was in fact not only some air but poor re-circulation through the near plugged reservoir screen. So, $225 later I have my PS back with new hoses and pump.
Hardening heat treatment so the seal doesn't wear out the shaft i think. I doubt that you can overheat a shaft if you have a softer bushing bracing it around without having it to fail first.
@@michaelovitch friction causes heat no matter the material. Hardened steel as it gets heated goes from a straw color to tannish reddish color, then blue, and then a bluish black. It's annealing the steel, or normalizing it. I learned that making knives and doing my own heat treatment to harden the blade and then you have to temper the steel because it's actually so hard that it becomes very brittle. And tempering at around 400-500 degrees for 1-2 hrs softens it (turns those colors, preferably a dark straw color)enough so it's not brittle but still very hard. Something like that,lol.
@@michaelovitch How you make a shaft. The rough oversize shaft would of been harden (heated above austenitizing temperature and quenched), then tempered (heated to the temperature for the required mechanical properties and air cooled , followed by stress relieve ( normally carried out at 25 below final tempering temperature with a controlled heating and cooling rate) , then final machined and ground. The final product would have no color. The discoloration is from in service use. You would be surprised at how easy a steel shaft turns blue with a soft bearing when there is lubrication failure, I've seen many.
Cool fix! Any time you need to reuse a copper seal washer, heat it to *just* cherry red with a propane torch and allow it to air cool. This anneals the metal and makes it soft again. When copper is worked or compressed, it "work hardens" and becomes stiffer, making a good seal sometimes very difficult when it's reused. Annealing the metal allows the copper to re-form against the sealing surfaces just like a new one will.
Great fix as always! Once the vanes begin to wear and hang up in the rotor, it can cause cavitation in the fluid which breaks down the metal wear surfaces at the molecular level. That rapidly increases wear and ultimately it grenades itself.
That sort of wear is often caused by dirty fluid. I change mine about every 50,000 miles and have never had pump trouble. I don't put over 200,000 miles on a vehicle however. Keep those videos coming. Thanks, John.
With hydraulic pumps, you have aeration and cavitation that cause noise (like gravel rolling around in a can). Too much to go into, but you can Goggle it if interested. Once the pump surfaces are scored, pressure cannot be built properly and doesn't work right.
After replacing the pump it’s best to have the front tires off the ground, engine off then turn the wheel lock to lock a few times. Start it up and repeat. Should be quiet 👍🏻
Hey Mustie thanks for the midweek upload! Have you ever seen the South Main Auto video about the powersteering pressure switch causing the engine to lose computer signal over a certain RPM? It's a really interesting video on troubleshooting and how computers and sensors interacting can cause issues.
That sounds kind of like a "hip bone is connected to the shoulder bone" sort of thing. Or in computing terms, a program that has bugs in places where it shouldn't even have places. I often wonder how they get the code in these rolling networked environments to converge to something even semi-reliable.
I just wanna say „thank you“!:) i enjoy watching your videos and you wrenching for so long and I was always entertained and I always learnt something! Thanks to you I recently startet a whole Restauration of my MK3 Ford Escort Cabrio! Your influence has reached into a little German garage! Thanks a lot for that and thanks for not changing in all those years and with all your success! I hope this is going on forever! And I finally raise my beer for the old beater running again💪🏻 see you Sunday!🥳
Another interesting look at something off the beaten trail. - You were almost there, but it's not centrifugal force that pushes out those vanes on that rotor. Look more closely at the disc behind the rotor, you'll see it has ports near the centre, which communicate with the inner ends of the rotor slots [in which the vanes are fitted] and directs power steering fluid in behind the vanes so that they are forcibly pushed outwards to form a positive seal against the stator (outer ring) and build the pressure in the system. A first, I thought that's where you were going with the VW connection. Using centrifugal force alone, would not develop an adequate seal, and fluid would "blow by" the vanes - Path of least resistance back to the low pressure side of the rotor. On the subject of PSF (power steering fluid) yes, it does exist. Volvo use it in their power steering systems. Other fluids if used in lieu of PSF will lead to accelerated wear on moving parts. PSF also contains chemistry to protect and lubricate rubber/nitrile seals. Some systems can use CHF (central hydraulic fluid), or ATF, as would appear to be the case with your Toyota.
I agree with your statement on how it works, hard to explain by words alone with out a picture. I also agree with VetteKid and that a oil failure was the main cause of the wear.
Indeed, I suspect the ultimate failure mode was created by lateral runout of the main bushing. Just enough for rotor and stator to meet and begin shaving metal.
Happy you did this. I have a 2001 Tundra with 198,000 original miles on her. Nice to know if the steering goes I have a fix! She's my daily driver. Rusting where the rear flares got salt and water in it here in SE PA.
First time I’ve seen Darren operating with his Cool-Rays on. Guess his future’s so bright, he’s got to wear shades! Another good vid! Thanks little brother!
Pretty good timing. Im watching this on break at work. I actually make these pumps in TN. I cast them then they go to our building next door to be machined and assembled.
Thanks for the video. I have 2000 Tundra and everything looked the same under the hood so the video helped me decide to tackle the job myself. It helped big time and made it easier to get it done. Actually the alternator was starting to fail and knew that I had to remove steering pump to get to it from top cuz I didn't want to get to it from under the truck. So thanks very much for the info, I accomplished 2 tasks because of this video.
I'm at 199,500 on my well loved 1992 Camry. It too has made the groan a couple times due to low fluid, but have been lucky so far and just am refilling it occasionally. Thanks for the entertaining content.
Just be glad it was a Toyota. I was driving a 5-ton Dump Truck in the Army about, well let's say, 40+ years ago and the power steering pump on it went out while we were convoyed many miles out of town. I learned quickly to anticipate my turns LONG before needing them to go around corners! Come to find out it was the same power steering pump used in a Pontiac. We could have easily picked one up from a local dealership instead of ordering one; but, NO, I had to drive all the way back without power steering. Lucky I was young or I would have been 'slam worn out' on that trip. Ahhhhhhhhhhh memories.
The bearing failed allowing the shaft to get pulled out of alignment and then the spinny parts hit the non-spinny parts. Things got hot and probably overheated the fluid. There appears to be a lot of resistance when turning the shaft after the pump was apart. Also a bad seal is a tell tale sign because once the shaft can be pulled out of alignment, the seal losses contact with part of the shaft. After seeing the tear down and realizing the bearing is hydrodynamic, my bet is fluid deterioration led to the failure of the bearing. The fluid provides lubrication, obviously, but also has anti corrosion additives. Eventually it shears down and those additives get used up. If the fluid gets too hot, especially if it is old, it can oxidize which changes its properties. The vanes on the rotor get forced out by hydraulic pressure.
...thing is, the pump runs all the time, so you don't need to run the steering like that, otherwise you're just pushing air into the steering side of the circuit! Great to see these regular Wednesday vids, and greetings from Ireland! 💪👍
@@Onewheelordeal that's perfectly true, but you do that at the end once it's bled through the send and return. Not only that, but you only need to turn it slowly in one direction at a time - the torsion on the wheel holds the valve open, so you give it time to go through - you can hear it working through the system if you take your time. It's ok though - it's Mustie - he has his own way, and it always works out! 👍
Works the same as my air pump for the lumbar / side seat air bags. Vanes didn't retract and scored the walls . In my case flipped the vanes ,filed and lubed with lithium grease. .Good as new.
Just a little tip I learned from a GM mechanic he suggested that you start and stop motor in short intervals more like 1 or 2 seconds each time to pre prime the pump without cavitating it. And then top up the fluid every time you do that!! And then you don't get the whing of the pump as it works out the Air!! All the best from Canada
I always pre-prime the pump manually before even installing it, then before I put the belt on i spin the pulley by hand with a full reservoir before i even start the engine. Then i do what your GM tech guy said to do, never had even a little froth in the fluid doing it like that
My rack and pinion was leaking so I replaces it with a reman unit. The reman unit leaked immediately so I sent it back and decided to rebuild the old rack. Works great now and $200 cheaper. Only downside was that I had to pull the rack twice.
love these short maintenance videos, learning a lot of that. I have a Toyota as well, a few months ago I replaced the magnet pully of the AC system. Turned out to be that it was only the bearing making the problem.
Darren, my 94 4runner had a bad steering pump, and I had to replace it. What actually went bad wasn't the pump, but the vacuum assist on the side of the pump that controlled when it would function. An uncle of mine built his own front end loader with all kinds of parts, but he used a power steering pump for the hydraulics. He eventually went with a bigger one from a truck and it worked faster. I've used a power steering pump on a Char Lynn steering valve on a Toyota tractor with a John Deere steering cylinder, and it could be steered without the engine running as it had a built in pump for such a situation. The type steering valve I used was from a forklift, and is commonly used in rock climbing trucks.
I keep hearing about Toyotas having power steering systems go bad, which conflicts with the common assumption that Toyotas are reliable. apparently the cars are plenty reliable, its just the power steering rack/pump
Hey buddy fyi I own Scion made by Toyota. I rebuilt the engine and put a turbo on it. Point I am getting is next time you need to change ps pump bleed it exactly the way you were doing it BUT don’t start it!! Jack the front wheels off the ground and back and forth about 25 times and it will bleed perfect every time!! Love your content brother.
That is something i'v never seen before. Very cool how that all works together like that with no pulley seal. I never thought it would be a bushing , even bearings have seals. But I understand the theory and how it works now. Thanks for the show and tell today it was very informative, and fun watching you take it apart. See you on the next one. Cheers
should have ingraved mustie 1 some where on the case .. see if your contacted years down the road ..... lol hay i have your old power steering pump... yea stupid idea ... great vid !!!
LMAO, that last second really was the best. I feel that I have parts left over all the time. I got a whole bucket of bolts from God knows what. Everything seems to be working fine, I caulk it off as they must have given me extra bolts washers nuts all the time. This just confirmed that I'm not the only one this happens to. Mustie1 thanks for keeping it real, your mid-week videos are great on breaking up this guy's 5 day a week job.
I don't think I've done many projects without having something left over and it still works fine! Throw it in my bolt and nut drawer for another project!
The two independent spinning rotors are probably for two separate circuits, one to force fluid through the rack and the second one to return the fluid up to the reservoir. Harley oil pumps run a similar setup.
There actually aren't two spinning rotors in this pump. The vaned rotor is indexed to the input shaft, and the inner plate that Mustie was spinning is indexed to the rear cover via the pin that you can see protruding from the rear cover when he removes it. Just the vaned rotor spins in these pumps, with all other removable parts being held stationary via similar pin indexing systems.
Any parts that have a core charge get rebuilt. It's always fun to see how things work and why they stopped working. Maybe it's cheaper to rebuild it ourselves. And you show us how it's done. Love watching you're videos!
Ford Ranger, known for loud pumps. Mine started going loud just like yours, truckeybastered it out with new 5x times over a few days with new fluid (230k miles). It returned to almost normal sound level (maybe 10% louder then it was vs 300% louder before I kept replacing the fluid). And never had a problem for 35k more and sold it). So... who knows I may of got lucky and had bad fluid due to age and changed it in time to save it.... Keep in mind when I heard it get loud I didn't drive it (driveway about to leave and turned it off, got new fuild in, drove 2 100ft circles to cycle it and repeat suck out old for new 5x times) so I likely was lucky I caught it before it did too much damage. Note: it steered find with no increase noise, but idle I could tell the ps pump was louder. Most cases it starts going away from home, you drive back and damage is done. PS open parking, no crubs for 400ft or cars - lot with snow - why not donut but women for some reason think its crazy....
@Mustie1 Had a Lexus IS200 with a failed pump like this. You can unscrew the socket on the pump where the banjo bolt connects (where you had issue with the copper crusher) and in there is a ball bearing, spring and a little mesh filter screen inside for overpressure events (e.g. when trying to turn the front wheels and there is something physically blocking them from turning like a wall). If you take out the ball and spring and give the screen a clean with some carb cleaner and dry it out with some shop cloth, reassemble and that’ll fix it. P.S. fill the pump with fluid before installing and then after installing with engine off and wheels off the ground, spin steering wheel lock to lock a few times and then start engine and run lock to lock while topping up with fluid as needed!
As a manufacturer of retaining rings, those are the cheapest and nastiest things to remove. Cheap is why they use them. Always fun to see what you're up to. failure mode: contamination of the fluid causing excessive wear in the vane pump. Could have come from anywhere in the system. Watch for other issues. as a side note. similar components (oil pumps and transmission pumps, rotary style) are made 60 miles from you in Portland. Big facility. Enjoy the warm weather.
That hurt watching you start it dry and wheel it left and right. You are supposed to fill it. Turn the steering wheel with front wheels off the ground and the ENGINE OFF. Several times lock to lock to push fluid through system. Then start it. Any whining at all is causing damage.
@@briansantefort ATF has been used by some manufacturers for decades, and the pumps effectively last forever if there is no external failure trigger. I'm a little surprised that the failure wasn't a notch formed by cavitation. When the reservoir filter screen gets clogged or cold fluid doesn't flow well enough, the inlet side of the pump starts creating enough of a vacuum to allow cavitation. The bubbles, especially the collapsing bubbles, focus energy on the metal surface that starts erosion. The bubbles typically form at the fastest moving highest pressure change region, where the vane contacts the casing. At some point a step is worn on the surface which accelerates the process. Here your description suggest that contaminated fluid was the cause.
Excellent video Mustie 1 :) one thing go bad is bearing very rare on lines on less doing loads sharp turn get screaming sounds when turn left or right turn moans sounds but straight doing same think go hose leak out fluid to! But how save pump plus lines also rack is add 100 ml of 80w90 differential fluid every 3 months with same fluid pump takes don't over flow them top off to also spary pentriotion fluid on to inner pulley to were bearing is to ! I done that for all my vechiles and never had pump or lines to yet surprises me or bearing too! Hope tip helps you out and others too ! 80w90 differential does mix up good and save steering rack too plus lubes lines up too! Also I changed Power Steering fluid ever 5 years plus 160.000 kms witch ever come first in years or kms too!
Centrifugal force pushes the paddles partway out the slots. Back in the 80s used to disassemble and clean the graphite paddles in an air compressor which worked the same,or close enough anyway. The boss called it a milkhouse compressor,no storage tank,just steady setable air we used for texturing drywall.
That's the same pump that's in the Traverse-Enclave-Acadia, and those things are JUUUUUNK! It's amazing that it lasted that long. GM recommended using trans fluid (DEX6) in there power steering systems in those vehicles to help quiet them down, so using trans fluid should be OK. This is the first time I've seen one apart, but I've damn sure replaced enough of them.
I read that Enclaves also had rack issues and needed replacement. Almost like a recall. Also there is a power steering fluid filter that can be installed in the return line. Looks like a big fuel filter.
It's a rotary vane type pump. In the winter when the fluid is cold, you can get that whining sound. Thats air in the system as the very cold fluid cavatates. The cavitation causes little shockwaves which over time can cause the metal to distort(usually the vane) which causes littles chips that will mare the surfaces(as seen in the rotor housing. It's best not to move the steering wheel very much until the fluid warms up and sound goes away. It's a good sign that the power steering pump is getting tired, but often replacing the fluid with OEM fluid is helpful, fluid does wear out . But cause of failure, , Pumps like everything else, wear out but they usually tell you when they are getting tired.
Subtle confession. Boys will be boys. Two trains of thought on high mileage (older) vehicles. Baby them, or romp on 'em 'til they break. We know what school you went to. Good show.
When the pump is operating, the vanes are thrown outward by centrifugal force against the wall of the pump. This is what forces the fluid pressure through the system. I've rebuilt lots of these. All internal components are replaced, along with seals & bearings
At the dealerships we reseal those all the time. You are correct, the vanes should be free to move effortlessly. Usually the rubber seals harden with age & heat which causes cavitation, that is what damages the metal.
Mustie, your trip with Mrs Mustie in the heavy snow and finding an abandoned movie theatre was sounding like the start of something like the Rocky Horror Show until you started doing doughnuts in the carpark. Ha!
I have replaced many pumps and a few steering racks. The way I fill the system: 1 poor fluid in, till level doesn't drop. 2 don't start engine but with the wheels up in the air steer back and forth. 3 check level, fill and steer some more till level is constant. 4 now start the engine, don't steer but fill fluid. 5 with running engine steer back and forth and final level check. Even a complete empty system the pump never runs dry or makes noise. But you will see micro air bubbles in the oil. So I go a little bit over max level. It's really cool to use the rack to push the oil though the system and bleed almost all air out.
At first I thought o wow Musties hit the big time. He’s not even worried about the core charge. I should have known better. Lol. Thanks for all you do Mustie.
On Honda Accords the o-ring in that elbow is the most common cause of the whine and a few cents to repair. The symptoms will be the whine with a frothy fluid on cold start. The whine will tend to go away when metal heats/expands and the system seals and clears the air. There are many higher mileage accords that get new pumps when an oring will fix it. If one lets it go too long, the pump will fail. It takes less than a minute to replace.
cool I never seen the inside of a power steering pump :). them bubbles can be a real pain in the ars for some vehicles lol. I was told a trick years ago to avoid air bubbles raise the front of the vehicle don't start it just rotate the steering back and forth until the levels are correct and stops taking more fluid.
I concur with both The Blueberries Workbench and Yorkshire Rose. I, too, believe that failure was from foreign matter in the oil. When I saw the wear on the rotor and end plates, I first thought that the rack would likely be the cause of the contamination. Kudos to Yorkshire Rose, who obviously has knowledge of hydraulic pumps.
Fun watching the pump being taken apart. Never had to change a PS pump. I used to "rep" a line of rebuilt parts. Sold a lot of them! Thank God for the Ford motor company... Their pumps were junk!
The difference between the two types of fluid is ATF has friction modifiers blended in where power steering does not. The modifiers are there to assist the clutches in the proper engagement. Its important to choose the correct ATF for your vehicle. The wrong fluid could go two ways, it could cause harsh clutch engagement shortening clutch life or it could go to the opposite extreme by causing the clutches to slip burning the fluid and clutch material plus scorching the steels.
at 215 thou it's old age and old fluid for sure. that's why it should be changed at certain service intervals. my seat ibiza pump needs flushing and they recommend turning the steering wheel full lock left then right 10 times (with the front jacked up) to expel air from the system before starting the engine, just keep an eye on the reservoir and top up if needed.
Transmission fluids have friction modifier’s in them. The transmission designers for each brand determine how much they want in the fluid for their design. The older Ford transmissions had harder fibers on the bands and discs so the F type fluids have aggressive friction additives to work with the fibers. Chevy used softer fibers for smoother shifts so the Dexron types had less “grip”. Power steering or basic hydraulic fluid has no friction additives since there are no clutch fibers in the system. The transmission fluid scarred the pump internals. If you want ANY transmission to shift firmer, add a little type F fluid to it. It makes the clutches and bands grab faster and harder. It does make the softer fibers wear faster though. ATB.
A Vickers style vane pump. Ford used these for years. In really cold weather the vanes don't want to move out on initial start up. It takes anywhere from a few seconds to a couple of minutes for the fluid to get viscous enough for the vanes to move.
On my truck, the serpentine is chirping. It's stretched out near its maximum. The tensioner arm has two lines & the base has one line to indicate the stretch of the belt. I get about 3 years (about 25,000 mi) of service from the belt.
For what it's worth, when I worked at the dealership, they always had us pick the front end up to get the weight off, then run the wheel back and forth slowly. I guess it was just gentler? And you could control the bleeding process better.
Keep ‘‘em coming with this truck. I have the same one although mine is 21 years old and nothing wrong with it other that I had to replace the radiator.
The innards remind me of a vane pump -- like the one I took apart and repaired -- from a 1930's refrigerator. Used pump to supply air to a crude diving bell made of a 5 gallon oil can. Powered with a 2 hp Briggs motor.
Great timing. My wife's power steering went out a week or so ago. This is her first time driving a car without power steering. It will shortly be her last if I know what's good for me. 🙄😁
My son did the same thing with his Mercedes AMG, fried the $1300 power steering/suspension duel hydraulic pump, doing donuts in a parking lot. The shaft on that pulley is blued right where that bearing is located in the front of the pump. That could be a result of overheating due to high RPMs sustained in a 215K pump. Loose tolerance and some small piece of metal, maybe rust in the line from a fitting, or just a chunk inside the pump itself, but whatever it was is def, galled it all up. Probably not an issue at "normal RPM" and load, but with 4WD on and pulling hard in a spin, that poor old guy never had a chance. A valiant effort though.
Cold thick worn out fluid? Lost it's ability to lubricate? Metal was heating and close to welding? I had it happen on a Honda automatic transmission fluid pump. I got in it on a cold snowy day at work, started doing very high revs in the parking doing donuts. The engine stopped, like it seized, which is what I thought. Nope, it was the trans fluid pump gears had welded themselves to the backing plate in the trans. Fun to find that one :)
The back plate and the rotor wear and you end up with excessive clearance reducing the psi the pump needs for the system, I used to tear these style pumps down hundreds per day and the plates were sent to the guys running the surface machine to get smooth again and then put back together with new parts and then tested, we did the Ford units since we were a Ford manufacturer.
Thank you for the short video in the middle of the week very entertaining I recently worked on my friend's car it's a 1992 Toyota Corolla it almost has three hundred thousand miles on it I had to do the oil pan gasket what a nightmare
First time seeing the inside of a power steering pump. very interesting to see how it works. thanks for sharing. take care 👍
A first for me also.
There will be another one soon. He bought a rebuilt pump off the internet!!! It will fail inside of 6 months.
Same here. I had a basic understanding of their function, but had never torn one down for dissection. This was great!
@@gags730 I immediately thought of the Wankel rotary engine as well when he first opened it up.
I thought of a pneumatic impact hammer
Absolutely love your videos. I could sit here and watch you perform autopsy’s all day on broken/failed mechanical items. You do such a great job explaining things and asking the questions I myself am thinkin in my head. So cool Mustie. Always love you’re videos.
I would have to say it was the 215000 miles that killed that PS pump...lol
I like these shorter videos, where you tackle a single problem.
Personally I've never been blessed with a single problem.
Back in the 1970's and early 80's, home mechanics was a nightmare- there were no battery operated impact wrenches, or any other tools available to the home diy'er like there are today-and so I used to get so pissed off at not being able to remove certain screws /nuts/bolts etc because the motor manufacturers made it impossible for us to do our own servicing! Thank goodness we have these tools now, (oh and guys like you to show us how-that's just the best bit- even though now my car is a lease one so even a flat tyre is their problem)
I noticed during your latest test that the power steering was working great and no leaks, but there was something leaking out of the multi-black hoses right above it. Your channel is the best. I'm hooked.
Being a mechanic for 40 years I’ve replaced a bunch of ps pumps but never took one apart. Thanks to you now I don’t have to 🤣🤣thanks for the entertaining videos.
What normally goes bad is the bearing-- and once the bearing goes it causes the seal to get wallered out and leaks (as yours was doing). Also, the tension of the belt now pulls the shaft out of alignment since the bearing is too far out of spec and that causes all the machined surfaces of the pump to impact and chew each other up. It's a pretty cool design in that: all the wear surfaces are replaceable; I can see why the core has value now.. The weak link is the bearing though- and the tension of the belt always pulling sideways on the shaft/ especially at higher RPM's and higher acceleration. lol
Higher RPM's and higher acceleration make better donuts. lol
As I understand it, there is a fundamental difference between an automatic transmission and a power steering system, which is that the former contains clutches and the latter doesn't. Therefore, automatic transmission fluid can be too slippery, causing the clutches to slip, where power steering fluid is as slippery as possible.
@@alan6832 ATF and power steering fluid definitely are not the same. ATF is pretty benign as a fluid, but power steering fluid will destroy everything. It infiltrates and balloons rubber, eventually causing it to liquefy and fall apart. It also chews up belts and destroys paint.
If you got ATF in your power steering system, nothing bad would immediately happen. However, vice versa power steering fluid in an automatic transmission... stick a fork in it, it's done.
@@GGigabiteM Have you guys ever heard of, like, a workshop manual or manufacturer's recommendations? They always tell you what fluid to put where! Toyota's power steering systems tend to specify Dexron ATF, if I'm not terribly mistaken.
@@celeron55 Your entire comment shows you're an armchair mechanic with no wrenching knowledge.
I have a truck outside right now where I had to make my own diagrams for almost every system because the factory Mopar diagrams either don't exist, or are completely wrong. And this is a stock unmodified truck.
I've also worked on dozens of cars where the same was true. The locations of things weren't marked, or were incorrect. And if you blindly trust them, it would have caused thousands of dollars of damage.
And with today's companies becoming increasingly anti-repair, good luck finding diagrams or even parts. Tesla doesn't want you working on your own vehicle, will not sell you parts, and will blacklist your car's VIN if they detect unauthorized parts attached to your car if you tried to replace something to repair it yourself.
It's funny how watching these videos can change your whole outlook. I'm no mechanic but, before my health deteriorated, I 𝒎𝒊𝒈𝒉𝒕 have tackled the pump replacement. Like many folks though, it would have been a kinda daunting prospect.
Watching Mustie change them over, this seemed like a really, really straightforward job. It dawned on me that I watch so many videos of similar work, that I'm used to seeing folks dig far deeper, rather than just changing one component. So often, multiple components have to come out, just to reach the part you're after. In many videos, the whole engine gets pulled, so a p.s. pump seemed so easy by comparison.
Funny how getting more familiar with this kind of work can change the way we think, or is it just me?
I've been a "shade tree" mechanic 20+ years... even a few years as running an actual shop and sometimes i still look at jobs and think oh boy here we go, think this looks like a lot or even doubt my ability sometimes still. Especially on a customers or a friends car. Honestly i think it keeps me on my toes lol. Checking my work multiple times. or a seemingly routine job i will check the procedure for that particular vehicle just to make sure. Which has saved many times. I am Always nervous about timing belts on interference engines even though I've probably done over 100 of them. Check marks rotate engine 3 times check marks again. rotate a tiny bit backwards check belt tension. rotate 3 more times check it again Etc lol. I messed up one time and knew it right away. Such a bad feeling to know i just caused over 1000 dollars worth of damage in seconds that could have been avoided. Thanks for reading! If you are still with me I Hope You Are Having A Great Day ! And I Hope You And Your Loved Ones Are Safe, Healthy And Happy!!
@@bentboybbz I worry just as much as you do. I think this is what keeps you from messing up. My colleagues often get overconfient, lazy, aloof, and I think this keeps them from asking questions. Questions like, will it seal, is changing only this part enough, what is the cause, will it work this way? etc. Every car should be treated as the most important thing currently. Changing the timing on my first car, knowing it was a non interference engine, I still turned it over at least 15 times I was so worried. Cheers to you as well!
@@bentboybbz ...nice thoughts here well conveyed too.
I remember rebuilding my power steering pump on my old 2002 Toyota I had forgotten about that watching your video sent me down memory lane. I just rebuilt mine as a precaution because I had it apart
Some thoughts from a retired transmission builder: That is a 'vane type pump'. The ONLY way that pump can become scored is from a loss of oil for a given length of time. I noticed that one of the lines to the pump has a very tight radius, and this might have created a restriction to flow.
Over time, this could starve the pump, and starvation made worse if any fluid has leaked out of the system. There could also be a restriction elsewhere in the system which would create a situation for pump cavitation, which would also cause the pump to fail. Possible that the flexible hose has delaminated inside and is serving to plug off the flow.
There should be a pressure relief valve somewhere in that system that regulates the entire system pressure.
Otherwise, these vane pumps are known for both high pressure and high volume and are prone to failure if sufficient pressure and fluid volume are NOT present.
Look for any inline filters that may well be blocked, because there has been serious fluid contamination with fine solid matter that may serve to destroy your new pump! You don't need/want that - either!
The screen in the bottom of the reservoir gets clogged and will restrict fluid flow. Reservoir gets overfilled and the rest of the system starves
@@chadmckenzie7454 yeah, I bet his screen is near plugged and I don't think he cleaned it. Quick google search would've helped, but maybe he just didn't film it.
Insightful comment! much appreciated
ive had a similar experience in my 2007 Tundra 4.7L V8 after doing some hot dogging around in the mud.
My question is this, do you think it has caused any damage to the rack & pinion?
Also is there a factory filter somewhere in the Power steering system that should be changed after a situation like this?
I just went through all of this with my Toyota pick up, 310k miles. My pump was getting noisy, I think actually because the screen in the reservoir was near completely blocked with 30+ years of debris. Replaced pump with a reman and disassembled old, original Denso pump and could find no obvious damage and little wear. Very impressive. It's quit possible that what caused the noise chirping was in fact not only some air but poor re-circulation through the near plugged reservoir screen. So, $225 later I have my PS back with new hoses and pump.
On the old pump shaft it looked like heat discoloration on the bearing end.
yup noticed that to. A lot of blue heat markings.
Hardening heat treatment so the seal doesn't wear out the shaft i think.
I doubt that you can overheat a shaft if you have a softer bushing bracing it around without having it to fail first.
...noticed that too, bad design on the shaft bearing, tho 200K on that part aint bad
@@michaelovitch friction causes heat no matter the material. Hardened steel as it gets heated goes from a straw color to tannish reddish color, then blue, and then a bluish black. It's annealing the steel, or normalizing it. I learned that making knives and doing my own heat treatment to harden the blade and then you have to temper the steel because it's actually so hard that it becomes very brittle. And tempering at around 400-500 degrees for 1-2 hrs softens it (turns those colors, preferably a dark straw color)enough so it's not brittle but still very hard. Something like that,lol.
@@michaelovitch How you make a shaft. The rough oversize shaft would of been harden (heated above austenitizing temperature and quenched), then tempered (heated to the temperature for the required mechanical properties and air cooled , followed by stress relieve ( normally carried out at 25 below final tempering temperature with a controlled heating and cooling rate) , then final machined and ground. The final product would have no color. The discoloration is from in service use. You would be surprised at how easy a steel shaft turns blue with a soft bearing when there is lubrication failure, I've seen many.
Cool fix! Any time you need to reuse a copper seal washer, heat it to *just* cherry red with a propane torch and allow it to air cool. This anneals the metal and makes it soft again. When copper is worked or compressed, it "work hardens" and becomes stiffer, making a good seal sometimes very difficult when it's reused. Annealing the metal allows the copper to re-form against the sealing surfaces just like a new one will.
Centrifugal force is what you were looking for!! Thanks for sharing
I used to assemble these years ago. Brings back memories.
Great fix as always! Once the vanes begin to wear and hang up in the rotor, it can cause cavitation in the fluid which breaks down the metal wear surfaces at the molecular level. That rapidly increases wear and ultimately it grenades itself.
I enjoy these teardown and why-did-it-fail videos just as much as the ones where you restore equipment and make it run again.
That sort of wear is often caused by dirty fluid. I change mine about every 50,000 miles and have never had pump trouble. I don't put over 200,000 miles on a vehicle however. Keep those videos coming. Thanks, John.
Yeah, I have to wonder about old fluid.
Old fluid causing cavitation and hence the bad surfaces? Does this fluid also attract moisture like brake fluid I wonder..?
@@macbeth2354 Its atf fluid, so it doesn't attract water.
Love watching peoples reaction to these pumps. I build these for a living.
listen bud, you aint never work on no damn steering pump lubrul.
With hydraulic pumps, you have aeration and cavitation that cause noise (like gravel rolling around in a can). Too much to go into, but you can Goggle it if interested. Once the pump surfaces are scored, pressure cannot be built properly and doesn't work right.
Have a 04 4runne with 240k. My pump is leaking but still works. Ordered a rebuild kit. This video just help my figure out how it comes apart. :)
After replacing the pump it’s best to have the front tires off the ground, engine off then turn the wheel lock to lock a few times. Start it up and repeat. Should be quiet 👍🏻
😊Yeah kinda set my teeth on edge watching that.
100% correct. Prime it with just the rack. Less foaming.
or take it out and turn in the snow
Yup. That how I did it when I was still turning wench. Thats the method GM recommends.
Hey Mustie thanks for the midweek upload! Have you ever seen the South Main Auto video about the powersteering pressure switch causing the engine to lose computer signal over a certain RPM? It's a really interesting video on troubleshooting and how computers and sensors interacting can cause issues.
That sounds kind of like a "hip bone is connected to the shoulder bone" sort of thing. Or in computing terms, a program that has bugs in places where it shouldn't even have places. I often wonder how they get the code in these rolling networked environments to converge to something even semi-reliable.
I just wanna say „thank you“!:) i enjoy watching your videos and you wrenching for so long and I was always entertained and I always learnt something! Thanks to you I recently startet a whole Restauration of my MK3 Ford Escort Cabrio! Your influence has reached into a little German garage! Thanks a lot for that and thanks for not changing in all those years and with all your success! I hope this is going on forever! And I finally raise my beer for the old beater running again💪🏻 see you Sunday!🥳
Another interesting look at something off the beaten trail. - You were almost there, but it's not centrifugal force that pushes out those vanes on that rotor. Look more closely at the disc behind the rotor, you'll see it has ports near the centre, which communicate with the inner ends of the rotor slots [in which the vanes are fitted] and directs power steering fluid in behind the vanes so that they are forcibly pushed outwards to form a positive seal against the stator (outer ring) and build the pressure in the system. A first, I thought that's where you were going with the VW connection. Using centrifugal force alone, would not develop an adequate seal, and fluid would "blow by" the vanes - Path of least resistance back to the low pressure side of the rotor.
On the subject of PSF (power steering fluid) yes, it does exist. Volvo use it in their power steering systems. Other fluids if used in lieu of PSF will lead to accelerated wear on moving parts. PSF also contains chemistry to protect and lubricate rubber/nitrile seals. Some systems can use CHF (central hydraulic fluid), or ATF, as would appear to be the case with your Toyota.
I agree with your statement on how it works, hard to explain
by words alone with out a picture. I also agree with VetteKid and that a oil failure was the main cause of the wear.
Indeed, I suspect the ultimate failure mode was created by lateral runout of the main bushing. Just enough for rotor and stator to meet and begin shaving metal.
Thanks for sharing. Precise and concise. Does psf have a lower viscosity than atf?
you are good , i do lots of pump work
So it uses the pressure it creates internally to force the vanes out so that they seal in order to create pressure …?
Happy you did this. I have a 2001 Tundra with 198,000 original miles on her. Nice to know if the steering goes I have a fix! She's my daily driver. Rusting where the rear flares got salt and water in it here in SE PA.
First time I’ve seen Darren operating with his Cool-Rays on. Guess his future’s so bright, he’s got to wear shades! Another good vid! Thanks little brother!
This video confirms Mustie is a kid at heart like the rest of us. Blowing his PS pump while doing donuts LOL
Pretty good timing. Im watching this on break at work. I actually make these pumps in TN. I cast them then they go to our building next door to be machined and assembled.
Thanks for the video. I have 2000 Tundra and everything looked the same under the hood so the video helped me decide to tackle the job myself. It helped big time and made it easier to get it done. Actually the alternator was starting to fail and knew that I had to remove steering pump to get to it from top cuz I didn't want to get to it from under the truck. So thanks very much for the info, I accomplished 2 tasks because of this video.
I'm at 199,500 on my well loved 1992 Camry. It too has made the groan a couple times due to low fluid, but have been lucky so far and just am refilling it occasionally. Thanks for the entertaining content.
Just be glad it was a Toyota. I was driving a 5-ton Dump Truck in the Army about, well let's say, 40+ years ago and the power steering pump on it went out while we were convoyed many miles out of town. I learned quickly to anticipate my turns LONG before needing them to go around corners! Come to find out it was the same power steering pump used in a Pontiac. We could have easily picked one up from a local dealership instead of ordering one; but, NO, I had to drive all the way back without power steering. Lucky I was young or I would have been 'slam worn out' on that trip. Ahhhhhhhhhhh memories.
The bearing failed allowing the shaft to get pulled out of alignment and then the spinny parts hit the non-spinny parts. Things got hot and probably overheated the fluid. There appears to be a lot of resistance when turning the shaft after the pump was apart. Also a bad seal is a tell tale sign because once the shaft can be pulled out of alignment, the seal losses contact with part of the shaft.
After seeing the tear down and realizing the bearing is hydrodynamic, my bet is fluid deterioration led to the failure of the bearing. The fluid provides lubrication, obviously, but also has anti corrosion additives. Eventually it shears down and those additives get used up. If the fluid gets too hot, especially if it is old, it can oxidize which changes its properties.
The vanes on the rotor get forced out by hydraulic pressure.
The donuts prolly' didn't help...
Friends:What did you watch today?
Me: A dude perform an autopsy on a power steering pump!
...thing is, the pump runs all the time, so you don't need to run the steering like that, otherwise you're just pushing air into the steering side of the circuit! Great to see these regular Wednesday vids, and greetings from Ireland! 💪👍
Almost every service manual calls for you to do that if it's worth anything
@@Onewheelordeal that's perfectly true, but you do that at the end once it's bled through the send and return. Not only that, but you only need to turn it slowly in one direction at a time - the torsion on the wheel holds the valve open, so you give it time to go through - you can hear it working through the system if you take your time. It's ok though - it's Mustie - he has his own way, and it always works out! 👍
Works the same as my air pump for the lumbar / side seat air bags. Vanes didn't retract and scored the walls . In my case flipped the vanes ,filed and lubed with lithium grease. .Good as new.
Just a little tip I learned from a GM mechanic he suggested that you start and stop motor in short intervals more like 1 or 2 seconds each time to pre prime the pump without cavitating it. And then top up the fluid every time you do that!! And then you don't get the whing of the pump as it works out the Air!! All the best from Canada
I always pre-prime the pump manually before even installing it, then before I put the belt on i spin the pulley by hand with a full reservoir before i even start the engine. Then i do what your GM tech guy said to do, never had even a little froth in the fluid doing it like that
My rack and pinion was leaking so I replaces it with a reman unit. The reman unit leaked immediately so I sent it back and decided to rebuild the old rack. Works great now and $200 cheaper. Only downside was that I had to pull the rack twice.
love these short maintenance videos, learning a lot of that. I have a Toyota as well, a few months ago I replaced the magnet pully of the AC system. Turned out to be that it was only the bearing making the problem.
Darren, my 94 4runner had a bad steering pump, and I had to replace it. What actually went bad wasn't the pump, but the vacuum assist on the side of the pump that controlled when it would function. An uncle of mine built his own front end loader with all kinds of parts, but he used a power steering pump for the hydraulics. He eventually went with a bigger one from a truck and it worked faster.
I've used a power steering pump on a Char Lynn steering valve on a Toyota tractor with a John Deere steering cylinder, and it could be steered without the engine running as it had a built in pump for such a situation. The type steering valve I used was from a forklift, and is commonly used in rock climbing trucks.
I keep hearing about Toyotas having power steering systems go bad, which conflicts with the common assumption that Toyotas are reliable.
apparently the cars are plenty reliable, its just the power steering rack/pump
Hey buddy fyi I own Scion made by Toyota. I rebuilt the engine and put a turbo on it. Point I am getting is next time you need to change ps pump bleed it exactly the way you were doing it BUT don’t start it!! Jack the front wheels off the ground and back and forth about 25 times and it will bleed perfect every time!! Love your content brother.
That is something i'v never seen before. Very cool how that all works together like that with no pulley seal. I never thought it would be a bushing , even bearings have seals. But I understand the theory and how it works now. Thanks for the show and tell today it was very informative, and fun watching you take it apart. See you on the next one. Cheers
Thanks for doing this video. Mine is a 2006 I purchased in 2006. 200k and doing this job tomorrow.
should have ingraved mustie 1 some where on the case .. see if your contacted years down the road ..... lol hay i have your old power steering pump... yea stupid idea ... great vid !!!
LMAO, that last second really was the best. I feel that I have parts left over all the time. I got a whole bucket of bolts from God knows what. Everything seems to be working fine, I caulk it off as they must have given me extra bolts washers nuts all the time. This just confirmed that I'm not the only one this happens to. Mustie1 thanks for keeping it real, your mid-week videos are great on breaking up this guy's 5 day a week job.
I don't think I've done many projects without having something left over and it still works fine! Throw it in my bolt and nut drawer for another project!
Another wonderful autopsy. Leaving out a body part after suturing was so cool. And,I like your addition of an afternoon matinee...
The two independent spinning rotors are probably for two separate circuits, one to force fluid through the rack and the second one to return the fluid up to the reservoir. Harley oil pumps run a similar setup.
There actually aren't two spinning rotors in this pump. The vaned rotor is indexed to the input shaft, and the inner plate that Mustie was spinning is indexed to the rear cover via the pin that you can see protruding from the rear cover when he removes it. Just the vaned rotor spins in these pumps, with all other removable parts being held stationary via similar pin indexing systems.
Any parts that have a core charge get rebuilt. It's always fun to see how things work and why they stopped working. Maybe it's cheaper to rebuild it ourselves. And you show us how it's done. Love watching you're videos!
Ford Ranger, known for loud pumps. Mine started going loud just like yours, truckeybastered it out with new 5x times over a few days with new fluid (230k miles). It returned to almost normal sound level (maybe 10% louder then it was vs 300% louder before I kept replacing the fluid). And never had a problem for 35k more and sold it). So... who knows I may of got lucky and had bad fluid due to age and changed it in time to save it.... Keep in mind when I heard it get loud I didn't drive it (driveway about to leave and turned it off, got new fuild in, drove 2 100ft circles to cycle it and repeat suck out old for new 5x times) so I likely was lucky I caught it before it did too much damage. Note: it steered find with no increase noise, but idle I could tell the ps pump was louder. Most cases it starts going away from home, you drive back and damage is done. PS open parking, no crubs for 400ft or cars - lot with snow - why not donut but women for some reason think its crazy....
Doing donuts🤔 no!! Well with that many miles. Just wore out.... Thanks mustie for sharing. Enjoyed it......
@Mustie1 Had a Lexus IS200 with a failed pump like this. You can unscrew the socket on the pump where the banjo bolt connects (where you had issue with the copper crusher) and in there is a ball bearing, spring and a little mesh filter screen inside for overpressure events (e.g. when trying to turn the front wheels and there is something physically blocking them from turning like a wall).
If you take out the ball and spring and give the screen a clean with some carb cleaner and dry it out with some shop cloth, reassemble and that’ll fix it.
P.S. fill the pump with fluid before installing and then after installing with engine off and wheels off the ground, spin steering wheel lock to lock a few times and then start engine and run lock to lock while topping up with fluid as needed!
As a manufacturer of retaining rings, those are the cheapest and nastiest things to remove. Cheap is why they use them.
Always fun to see what you're up to.
failure mode: contamination of the fluid causing excessive wear in the vane pump. Could have come from anywhere in the system. Watch for other issues.
as a side note. similar components (oil pumps and transmission pumps, rotary style) are made 60 miles from you in Portland. Big facility.
Enjoy the warm weather.
That hurt watching you start it dry and wheel it left and right.
You are supposed to fill it. Turn the steering wheel with front wheels off the ground and the ENGINE OFF. Several times lock to lock to push fluid through system. Then start it. Any whining at all is causing damage.
Also I never use ATF in power steering. Always clear synthetic PS fluid. Or light hydraulic oil only.
@@briansantefort my 69 mustang takes type f atf my dodge takes atf +4...
@@briansantefort Toyota spec is Dextron II or III ATF
@@briansantefort ATF has been used by some manufacturers for decades, and the pumps effectively last forever if there is no external failure trigger.
I'm a little surprised that the failure wasn't a notch formed by cavitation. When the reservoir filter screen gets clogged or cold fluid doesn't flow well enough, the inlet side of the pump starts creating enough of a vacuum to allow cavitation. The bubbles, especially the collapsing bubbles, focus energy on the metal surface that starts erosion.
The bubbles typically form at the fastest moving highest pressure change region, where the vane contacts the casing. At some point a step is worn on the surface which accelerates the process.
Here your description suggest that contaminated fluid was the cause.
@@briansantefort ATF works for everything.
I am really loving the midweek videos.
Excellent video Mustie 1 :) one thing go bad is bearing very rare on lines on less doing loads sharp turn get screaming sounds when turn left or right turn moans sounds but straight doing same think go hose leak out fluid to! But how save pump plus lines also rack is add 100 ml of 80w90 differential fluid every 3 months with same fluid pump takes don't over flow them top off to also spary pentriotion fluid on to inner pulley to were bearing is to ! I done that for all my vechiles and never had pump or lines to yet surprises me or bearing too! Hope tip helps you out and others too ! 80w90 differential does mix up good and save steering rack too plus lubes lines up too! Also I changed Power Steering fluid ever 5 years plus 160.000 kms witch ever come first in years or kms too!
Centrifugal force pushes the paddles partway out the slots. Back in the 80s used to disassemble and clean the graphite paddles in an air compressor which worked the same,or close enough anyway. The boss called it a milkhouse compressor,no storage tank,just steady setable air we used for texturing drywall.
That's the same pump that's in the Traverse-Enclave-Acadia, and those things are JUUUUUNK! It's amazing that it lasted that long. GM recommended using trans fluid (DEX6) in there power steering systems in those vehicles to help quiet them down, so using trans fluid should be OK. This is the first time I've seen one apart, but I've damn sure replaced enough of them.
I read that Enclaves also had rack issues and needed replacement. Almost like a recall. Also there is a power steering fluid filter that can be installed in the return line. Looks like a big fuel filter.
Some ppl like shorter videos yes But me I prefer longer videos because more information can be learned from your knowledge on many things that you do
It's a rotary vane type pump. In the winter when the fluid is cold, you can get that whining sound. Thats air in the system as the very cold fluid cavatates. The cavitation causes little shockwaves which over time can cause the metal to distort(usually the vane) which causes littles chips that will mare the surfaces(as seen in the rotor housing. It's best not to move the steering wheel very much until the fluid warms up and sound goes away. It's a good sign that the power steering pump is getting tired, but often replacing the fluid with OEM fluid is helpful, fluid does wear out . But cause of failure, , Pumps like everything else, wear out but they usually tell you when they are getting tired.
Subtle confession. Boys will be boys.
Two trains of thought on high mileage (older) vehicles. Baby them, or romp on 'em 'til they break.
We know what school you went to.
Good show.
Had a Mustie1 morning today. Saw a VW van like he has, then pulling into my neighborhood saw an estate sale and added to my hoard 😂👍
I like the longer videos, where you tackle multiple problems.
I wouldn't worry about that snap ring, you just saved the guy rebuilding the pump 30 seconds ;)
When the pump is operating, the vanes are thrown outward by centrifugal force against the wall of the pump. This is what forces the fluid pressure through the system. I've rebuilt lots of these. All internal components are replaced, along with seals & bearings
That is where you got your stash from, all the bits left over, lol, best videos on the net.
Surprising you are doing this, as my 2007 Sequoia just started to make a whining noise and I figure the power steering, well, then here you are! haha.
Good ol mustie letting the inner kido out. Gotta love it. I pictured you doing donuts while the lady is yelling. LOL.
At the dealerships we reseal those all the time. You are correct, the vanes should be free to move effortlessly. Usually the rubber seals harden with age & heat which causes cavitation, that is what damages the metal.
Mustie, your trip with Mrs Mustie in the heavy snow and finding an abandoned movie theatre was sounding like the start of something like the Rocky Horror Show until you started doing doughnuts in the carpark. Ha!
Thanks for taking it apart and showing us! You The Man!
If you got 215,000 miles out of that power steering pump, it didn't let you down, you are one lucky fellow 😉.
I have replaced many pumps and a few steering racks.
The way I fill the system:
1 poor fluid in, till level doesn't drop.
2 don't start engine but with the wheels up in the air steer back and forth.
3 check level, fill and steer some more till level is constant.
4 now start the engine, don't steer but fill fluid.
5 with running engine steer back and forth and final level check.
Even a complete empty system the pump never runs dry or makes noise.
But you will see micro air bubbles in the oil. So I go a little bit over max level.
It's really cool to use the rack to push the oil though the system and bleed almost all air out.
At first I thought o wow Musties hit the big time. He’s not even worried about the core charge. I should have known better. Lol.
Thanks for all you do Mustie.
On Honda Accords the o-ring in that elbow is the most common cause of the whine and a few cents to repair. The symptoms will be the whine with a frothy fluid on cold start. The whine will tend to go away when metal heats/expands and the system seals and clears the air. There are many higher mileage accords that get new pumps when an oring will fix it. If one lets it go too long, the pump will fail. It takes less than a minute to replace.
cool I never seen the inside of a power steering pump :). them bubbles can be a real pain in the ars for some vehicles lol. I was told a trick years ago to avoid air bubbles raise the front of the vehicle don't start it just rotate the steering back and forth until the levels are correct and stops taking more fluid.
I concur with both The Blueberries Workbench and Yorkshire Rose. I, too, believe that failure was from foreign matter in the oil. When I saw the wear on the rotor and end plates, I first thought that the rack would likely be the cause of the contamination. Kudos to Yorkshire Rose, who obviously has knowledge of hydraulic pumps.
One of your best videos. I like the switch up.
Fun watching the pump being taken apart. Never had to change a PS pump. I used to "rep" a line of rebuilt parts. Sold a lot of them! Thank God for the Ford motor company... Their pumps were junk!
The difference between the two types of fluid is ATF has friction modifiers blended in where power steering does not. The modifiers are there to assist the clutches in the proper engagement. Its important to choose the correct ATF for your vehicle. The wrong fluid could go two ways, it could cause harsh clutch engagement shortening clutch life or it could go to the opposite extreme by causing the clutches to slip burning the fluid and clutch material plus scorching the steels.
at 215 thou it's old age and old fluid for sure. that's why it should be changed at certain service intervals. my seat ibiza pump needs flushing and they recommend turning the steering wheel full lock left then right 10 times (with the front jacked up) to expel air from the system before starting the engine, just keep an eye on the reservoir and top up if needed.
Transmission fluids have friction modifier’s in them. The transmission designers for each brand determine how much they want in the fluid for their design. The older Ford transmissions had harder fibers on the bands and discs so the F type fluids have aggressive friction additives to work with the fibers. Chevy used softer fibers for smoother shifts so the Dexron types had less “grip”. Power steering or basic hydraulic fluid has no friction additives since there are no clutch fibers in the system. The transmission fluid scarred the pump internals. If you want ANY transmission to shift firmer, add a little type F fluid to it. It makes the clutches and bands grab faster and harder. It does make the softer fibers wear faster though. ATB.
I do think it's funny how some power steering systems ask for literal ATF. My Mazda6 asks for Dexron ATF.
A Vickers style vane pump. Ford used these for years. In really cold weather the vanes don't want to move out on initial start up. It takes anywhere from a few seconds to a couple of minutes for the fluid to get viscous enough for the vanes to move.
They have O-ring seals inside.& flat O-ring seals to.& nylon seals also. Some of those even have rubberized cup seals inside of some them to.
On my truck, the serpentine is chirping. It's stretched out near its maximum. The tensioner arm has two lines & the base has one line to indicate the stretch of the belt. I get about 3 years (about 25,000 mi) of service from the belt.
For what it's worth, when I worked at the dealership, they always had us pick the front end up to get the weight off, then run the wheel back and forth slowly. I guess it was just gentler? And you could control the bleeding process better.
Way to go Mustie Dude! Mid week pump action R&R!
Keep ‘‘em coming with this truck. I have the same one although mine is 21 years old and nothing wrong with it other that I had to replace the radiator.
The innards remind me of a vane pump -- like the one I took apart and repaired -- from a 1930's refrigerator. Used pump to supply air to a crude diving bell made of a 5 gallon oil can. Powered with a 2 hp Briggs motor.
Hey Mustie. Good video. Well, I guess they don't last forever. Thanks for sharing.👍👍🍁🍁
Great video! Best way to end a night shift, with a little mustie1 autopsy. Looking forward to more great content.
Great timing. My wife's power steering went out a week or so ago. This is her first time driving a car without power steering. It will shortly be her last if I know what's good for me. 🙄😁
Darren,
That Toyota pump may have lasted 215K miles but the rebuilt wont. None of the 'worn' metal parts are replaced
Paul (in MA)
My son did the same thing with his Mercedes AMG, fried the $1300 power steering/suspension duel hydraulic pump, doing donuts in a parking lot. The shaft on that pulley is blued right where that bearing is located in the front of the pump. That could be a result of overheating due to high RPMs sustained in a 215K pump. Loose tolerance and some small piece of metal, maybe rust in the line from a fitting, or just a chunk inside the pump itself, but whatever it was is def, galled it all up. Probably not an issue at "normal RPM" and load, but with 4WD on and pulling hard in a spin, that poor old guy never had a chance. A valiant effort though.
If it hasn’t been mentioned check the reservoir for a screen in the bottom. A lot of times it gets dirty and starves the pump for fluid.
"Now it's complete!" great Mustie1 said at the end. 😁😁😁👍👌👏
Dear Mustie1
Oh WOW! Only 1000 subs more and you will have 600.000!!! Well deserved of course. 👍👌👏
Best regards, luck and health.
Cold thick worn out fluid? Lost it's ability to lubricate? Metal was heating and close to welding? I had it happen on a Honda automatic transmission fluid pump. I got in it on a cold snowy day at work, started doing very high revs in the parking doing donuts. The engine stopped, like it seized, which is what I thought. Nope, it was the trans fluid pump gears had welded themselves to the backing plate in the trans. Fun to find that one :)
Thanks for the mid-week video . very enjoyable
The back plate and the rotor wear and you end up with excessive clearance reducing the psi the pump needs for the system, I used to tear these style pumps down hundreds per day and the plates were sent to the guys running the surface machine to get smooth again and then put back together with new parts and then tested, we did the Ford units since we were a Ford manufacturer.
Thank you for the short video in the middle of the week very entertaining I recently worked on my friend's car it's a 1992 Toyota Corolla it almost has three hundred thousand miles on it I had to do the oil pan gasket what a nightmare