How to EASILY Diagnose Engine Connecting Rod Knock! Spun Rod Bearing
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- Опубліковано 1 жов 2024
- Freddy shows you how to diagnose engine connecting rod knock or spun rod bearing and goes through the steps to find out if it's a connecting rod knock, and which cylinder it is.
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Knock knock. Who's there? Cylinder 3
I can imagine a mechanic saying this to a customer.
Mechanic: Welp, I have reached a conclusion.
Customer: ?
Mechanic: Knock knock...
Customer: ... Who's there?
Mechanic: Cylinder 3, you have rodknock.
Customer: o_o
ua-cam.com/video/mTbLP9VeC8A/v-deo.html
🤣🤣🤣
🤣🤣🤣🤣
Dude wow this hit so hard just now
Make life easy on yourself. Pull the plug wires, one at a time while the engine is running. If you have connecting rod noise, you'll hear the noise go away or get a LOT less when you pull the plug wire on the bad cylinder. This is because the cylinder with the bad connecting rod clearance (which is where the knock originates) is no longer "loaded" except by the intertial mass of that connecting rod/piston. The noise will get much softer, because there is no combustion power stroke to cause the piston to slam down against the loose rod bearing.
This is a faster way 👍
Easier to do this old school trick. Unplug one coil or spark plug wire (depending on your car). Start it. Does the knock sound quieter? If not, repeat for each cylinder. If it never get's quieter, than it must be something else.
That’s only for rod bearings. Main bearings won’t differ
@@warrenlancaster8045 This test is only for rod bearings as well
Yes it only the rod bearing
Don't you have to remove opposing rod cylinder wire as well on v8's?
Honestly how I've always found a rod knock, is to just pull the spark plug wire off of each cylinder as it's running, and whichever one stops knocking when you pull off the spark plug wire is the bad cylinder, and generally you can tell it's a rod bearing because if it was piston slap or a wrist pin, it tends to continue knocking even with the spark plug wire off.
what when i have 1 cyl engine?
Care to explain to a rookie what a piston slap or wrist pin are?
I thought that's how you would find a piston slap?
@@stonekeys6252 would usually indicate either 1 but if it continues its prob a main bearing knock
I thought some knock only on acceleration? Not just while idle
Love the way you did the step by step with this AND got really close with the camera to show us. I could actually do this myself with the right tools.😊 I love learning car stuff
i loved it so much thats all i do is build my car. true happiness
Thanks, after listening to that Kia I'm certain my L61 is toast.
On god me too 😂😂😢😓😓
2018 wow what a freaking driver destoying that baby. Now someones left with a messup cylinder.
Great video and great tip!! I really like how you put together the clip--editing and close-up!
Great video my man! Kudos for taking that challenge, enjoyed it much! And it was cool to see the extension used to find rod knock!
Thanks!
I have an 07 impala knock when driving
But quite when parked i rev the engine and no noise only when I drive
What can it be ?
It could be an exhaust leak. If you’re only hearing it inside
Probably the gearbox bearing
@rj jr guy asked a normal question no reason to be a dick
It is easier to use that method with an inline vertical engine; but how would it work with a V-ENGINE with the cylinders on a slant?
Dont use power tools installing or removing spark plugs ok kidz
Wow you really let that extension slam rite down on those piston tops lol. Im sure it isnt a HUGE deal though. Great tip however
just found your channel thans for the info im diagnosing my lawn mower... hehe poor mans mods heheh lawn mower...
Kia has a new ecu map...I suggest fixing it and upgrading ecu program ...it advances timing to soon and damages bearings from what I've read.
They should have done a recall on it. I hate how kia made the engines like that.
They did a class action lawsuit bee motor all 2.0 2.4 2.4T motors. Look it up I got a bee motor for free it was a manufacture issue. The oil passages where not properly drilled and cleaned leaving debris in the block and lack of flow to the rod bearings.
That’s false it is a oil starvation issue. They did a class action lawsuit on motors all the 2.0 2.4 2.4T motors. Look it up I got a bee motor for free it was a manufacture issue. The oil passages where not properly drilled and cleaned leaving debris in the block and lack of flow to the rod bearings. I got free towing a bran new short black and also a free rental.
Now just need the video for repairing the knock 😂
How can I diagnose a rod knock in my wife? I insert the extention in her ear?
Yes
@@drunkennewfiemidget4251 ;)
Is it possible that the ECU can cause an engine knocking mostly from a cold start, then taper off while it’s warming up ?
Or if there is a knocking it will be there the whole time while the engine is running?
Is it possible that just a portion of the programming could be off ?
Highly highly doubt you're knocking is caused by the ECU or an electronic problem
@@PoorManMods : You can doubt it, but It’s not a question about diagnostics, it’s a question about the electrics controlling the ignition. Do you have experience to tell me if just part of the programming can be corrupt or at least not programming correctly?
Is it all or nothing, or can part of it not work properly?
@@ginoasci2876 nothing is impossible but it is extremely unlikely that the programming got corrupt. Usually the ECU is either going to work or it's not going to work
You likely have a mechanical problem and when the engine heats up, the tolerances change and then knocking goes away. It's only going to get worse overtime
@@PoorManMods: it’s not going to get worse over time because some of these engines have 8000 miles and the run fine once they are warm.
A very high percentage of these engines develop this knock after the first service.
Very suspicious because the manufacturer doesn’t offer a solid answer about what oil is used at the first fill.
This is a motorcycle engine and a synthetic oil is recommended.
We have been searching for answers regarding the ECU and the first fill oil.
These are the only two causes because they are the only two things that change at a service.
Here the problem.
All these engines develop the knocking immediately following the first service.
My developed the knocking after the second service.
If the oil is changed on all the engines at the first and second service, mine would have debit at the first service, unless the dealer didn’t change my oil.
Very unlikely, so this only leaves the ECU.
Which is why I’m asking around about the possibility of a partial error in programming, not a corrupt ECU.
We’ve eliminated mechanical errors and faulty components because the manufacturer would have corrected it by now, and my bike ran great when I purchased it.
Ran just as great after the first service.
Something happened at that second service.
Possibly an ECU update, and an oil change.
My thoughts are the section of that programming that controls the air fuel mixture or the ignition timing is off just during the warm up stage, then as the engine is warming up the DCU recognizes this and makes the changes accordingly, the timing is corrected and the knocking slows down considerably or even goes away completely.
That’s what I think, but I don’t know enough about the programming.
I appreciate the responses.
Great channel.
Thanks!
Excellent video thanks. I have more understanding of the sounds. But it’s hard to hear what your heard. But I’m not as exsperienced
Thank you very much this will be useful for tomorrow to check my engine that i just installed and rebuild smh 😂😂
Thanks for watching!
Good troubleshooting. I like the way you found out which cylinder had the rod knock.
Thanks!
used this method on a 2004 corolla, found cyl 4 had bad slack. Thanks!
Just found your channel, glad I did!
Thank you! Please subscribe a
Connecting rod bearing get's a pounding & mostly on the power stroke. Poor rod bearing lubrication is a major cause of failure. (1) Under size oil passage (drilling) of crank shaft. (2) Poor quality material of bearing (journal). (3) Poor quality control...metal contamination (drilling/ slivers) left in crank shaft oil passages during manufacture. (4) Low oil pressure (not to often the problem).
Change your oil regularly & use a good synthetic brand. Good idea when draining is to use a clean container & check for metal contamination. For the over enthusiastic ...cut open the oil filter & inspect pleats for metal!
if you have to cut open oil filter after oil change you bought a wrong car, in fact you bought a garbage. Synthetic isnt necessary, i am not a fan of it. Conventional unless manufacturer calls for it. Keep it simple and standard, no need for special treatment it isnt SR 71 ffs
Adel Mujic you’re clearly somebody that doesn’t know shit about engines. How old are you???? 16? How the fuck would you know if you bought the wrong car if there’s no unusual noises coming from it at the time of purchase??? Cutting the oil filter open is not a bad idea if you don’t know the history of it. If the previous owner was a chick there’s a good chance that the oil change intervals were not adhered to religiously which can easily cause rod bearings to go to shit. When that happens you’ll have metal shavings throughout the entire engine. Short of dropping the oil pan, cutting open the oil filter is the best way to find out.
lzvagias good to know
Is there a way to diagnose a bad piston wrist pin? Engine shop is telling me my Triton V10 has piston skirt slap on #6 cylinder which requires a new engine. Compression is fine and the engine runs great other than the healthy knock.
Hey got a video of you fixing it?
I was hoping that very thing
Haha, I've got a 2005 3.5 v6 by Kia and just to get the plugs out is a bitch!
Thanks mate. My 95 Camry just started up some knocking on the freeway … Im hoping this is the problem…. 😬
Youre welcome, good luck!
How did you manually turn the engine???? Do you have a video for that?
I wish my plugs were that easy to access
for real. i need a 4 foot fucking magnet
Great video man. I've got some diagnosing to do on my ranger and I've been clueless on how to find the knocking rod
good luck with the ranger!
Kia latest and greatest. Korean disposable appliance recycle ♻️ after 💯 thousand miles
Lol toyota for life
Meh, as he said there was a problem in the manufacture of these particular engines, and Kia has been pretty good about replacing those engines in good faith, this one just happened to be too old to be covered. They're decent engines for the most part in my experience.
What should I type in the search inorder to learn how to turn engine manually? (2006 Chrysler town and country).
Great Vid👍btw
A lot of times you can get a socket on an alternator and turn the whole belt and crank.. if not, pull the passanger side tire and get a socket on the crank and turn clockwise
@@ianbowline404
TY,can't wait to learn more.🍻👍
interesting, I had the car up to 100K miles, and never had that issue, however, I change my oil every 3K miles.
I just replaced my serpentine belt, the next day it starts knocking, I thought I did something horribly wrong?
No I just own a 2.2 s10 in need of an attitude adjustment.
Oh noooo
Haha.... Wonder if CJ's know any of this stuff ? Great job bro
Thank you!
When I pushed mine on the Prius 2010, it got pushed all the way down and doing it on all 4. is that wrong? I'm getting a severe knock.
"The pistons gonna hit there rod" he says
Man, so I think the slapping I’m hearing is my chain tensioner because the sound goes away with higher revés and I have no loss of power.
Does rod knock stop with higher revés?
Could be the chain, rod knock will not go away to my knowledge
Class action lawsuit. I got a sonata dirt cheap had a rod knock was going to fix myself. I found out all 2.0 2.4 and 2.4T motors 2009-2018 every motor with rod knock gets fixed for free with being replaced with a bran new engine. Mileage age doesn’t matter it is also good for all subsequent owners, doesn’t matter if original or 25th owner. I had got free towing and also a free rental while they put a bran new short block motor in the car. Don’t believe me look up the Hyundai Kia class action lawsuit, don’t do the work just get a bran new motor all on the expensive of the dealership. It is a 785 MILLION dollar law suit for they HAVE TO fix the vehicle and the only way is with a bee motor. If you have a knock and car dies shuts off and throws check engine codes call dealership give vin they will confirm and then tow to dealership for free. If you have paid out of pocket for the motor to be fixed or replaced call the dealership they will reimburse you for the repairs.
Cool... I have a flat four motor tho...... 😂😭
My damn 2019 Elantra started consuming lots of oil since my recent oil change(3 months ago ),ran low and now stuck with a rod knock.My fifty year old Dodge uses less oil.
One question. I have a 2006 dodge ram 1500 4.7L so the problem I’m having is a ticking noise on my engine. It’s coming from the passenger side and it only starts ticking when the truck is warmed up. I have oil in it and been doing the oil change on that truck. Could it be the lifters?
Mine was cylinder 6. Knucklehead mech i sent it to couldn't fix it and still charged me 730usd. Basta&d.
Big dog great fuckin video. Excellent
Thank you!
Are you pushing the extension down the sparkplug holes to feel on the actual piston?
Yes
Is that a plastic intake. That’s awful should be least be aluminum or something more resistant to heat. Plastic wraps and is more flexible to heat then aluminum. If they are trying to make the car more light by using plastic do it in other areas not on the engine. I’ve even seen valve covers be plastic too no wonder these engines have issues now a days
Almost every modern engine has plastic intake manifolds and/or valve covers. Theyre light weight and insulate heat. Welcome to 2010 LOL
@@PoorManMods They are cheap and worse actually. I don’t drive or buy new cars older then 2010 oldest car o bought was from 2004 and it doesn’t have a plastic intake I just find it cheap
@@ryans413 lolol oohhh my
By heart feels that start up
so... it only works for cars with spark plugs directly over the piston... aight, back to the drawing board. just gonna do what needs to be done anyways and pull the pan and check caps lol
Great video I'll do that this weekend do you have the video when you fix it
We rebuilt the entire engine, the crank was even bent. No video though
Nice advice am from Mauritius Island.If we having an issue like this?
Am using Obd Torque pro am having a misfire on cylinder 4 can it be a rod knock will it recorded it as a misfire?But no engine management light is on I just get it on the application.
good tutorial and a nice trick. thank you. i subscribed
@@abderrahmanegouasmi7556 thank you!!
My 99 Toyota 5SFE has a rod bearing knock on two cylinders (2 and 3, I’ll switch out all four due to the dry oil change.
How much does it cost for a Chevy Silverado Z71 V8? Kinda scared to hear the price 😂. I recently have a noise coming from my truck and the noise is louder when you get near the oil pan. The noise goes faster when accelerating. I really hope I could get it fixed!!
Let me put it this way: when you hear it you will know
That doesnt help you to confirm which cylinder
@@PoorManMods that's true, but if u have rod knock shouldn't you replace all the rods and rod bearings?
Or engine swap lol
You replace the crank and 1 connecting rod like we did with this car
@@PoorManMods yes indeed, you are a better man than I. When my engine got rod knock I decided to send it to its death. With almost 300k miles it probably wouldn't have lasted much longer anyway haha
Also if u want to go SUPER cheap, just polish the crankshaft and the rods, then get new rod bearings. Though if you do this, your engine will not last very long. Then again it had rod knock so its sudden death is inevitable either way.
This is why I buy really cheap cars. Because I'm probably going to break them doing some stupid shit
Loooooool
1/16 of a inch is about 1.5mm fyi
I just bought a crown vic that got rod knock. The seller told me they had ot diagnosed as a cracked exhaust manifold which I know is possible but I've pretty well. It still sounds like it's flex plate knock as it is loudest directly in line with the flex plate when checking with a stethoscope but it's characterized exactly as rod knock. I'll use your steps here to see if I can figure it out. Fortunately it has straight piped exhust and no cats so I can here it's got a strong misfire on rhe drivers side so I have a starting point.
got a question im in the process of trying your method out and im not sure if im feeling it move or not but i do have a concern over when manually turning my motor over i have all spark plugs removed and its a little 1.8L 4cyl and the motor spins super easy until it gets to a certain point then it takes a considerable more effort to get it to turn then it spins suoer easy once again. i would assume that if the sparkplugs are out and there is no compression at all happening then it should spin easy throughout the crabks revolution and not get harder to turn could this be a sign of some sort of binding withing the crankshaft to pistion system?
CAN IT BE FIXED WITHOUT pulling out ENGINE ???
Pulling the engine makes it faster and easier
@@PoorManMods OK...
I heard of people driving with this knock for over 60 000 miles and engine is still running strong ! Possible?
Not the knock we had. The cylinder 3 rod bearing was GONE
Was driving to Wisconsin from calif . In Arizona started hearing a slight engine noise, checked oil, was full. Got louder, and louder, was Very loud , and then BANG! ENGINE DIED, rod thru block. Shamrock Texas. Layed up 5 days while a new shortblock installed. This was NOT MY VEHICLE, I was traveling with friends in their dodge van. Guess they didn't take good care of it as it was only 6 years old at the time.
Poor man doing everything him self is my kind of club.
Thank you.
Thanks!
I never imagined how cheap it is to rebuild a motor lol I'm currently sitting on a 2006 dodge charger with what sounds like spun rod bearing it doesn't necessarily knock but it runs rough but idles correctly with a occasional dip in rpm but that probably because of how rough it running the start up takes a sec it cranks for 2-3 seconds then fires right up the sound sounds like it is coming from the top tho but really could be anywhere lol I may be replacing rod bearings and sanding down the crank and connecting rod maybe shall see how it goes when I buy the parts and drain the oil and drop the oil pan if I can I don't remember if my car has any bars or anything in the way
I have a 2016 Kia soul for sale with this problem. It's in mint condition besides the engine issue.
I probably missed it in the video, but, is this the 2.0 or the 2.4? 😊😊 If I'm not mistaken the 2.4 but can't fully tell
Nice. Only works with spark plug holes that are centrally located in the cylinder head I expect (eg not my airhead bmw), but good technique anyway.
Same on my kia Morning
Thank you for the video. My 2010 Kia Forte is making a similar noise, but it doesn't have the rattling sound that yours has. Here it is: ua-cam.com/video/8xNRROlOEMM/v-deo.html Any insights? Hopefully I can get out and try your test later this week when it warms up a little. It is a 2.0 liter sedan with 172,000 miles on it.
Mine is the same Volvo V40 1.8 petrol. Lots of cleaning and sanding but can be done if your new bearing's are the write size
Top Notch Useful Tip! (But do wish you were able to go ahead and open up that oil pan in the Video) Thanks, man.
Thanks! Glad you enjoyed it!
LMFAO @ Nicolas Cage...😂😂😂
They extended the warranty to lifetime for rod bearing failure only, you should qualify.
just bought a 94 Pajero not sure what there called in north America anyway going to use this trick to see if it has connecting rod knock thanks for the infomation defiantly earned my sub
Thanks about to see if that's where my engine knock is coming from.... If so it's just time for me to trash the pos & find another car
Is it good idea to use impact wrench for removing spark plugs?
No
Yes do it. Most are backwards threaded too
Yep, my car is definitely fucked...
@Donalld Allhands going to the garage tomorrow, I'll ask about it thanks!
First commercial I think I've actually enjoyed ever on UA-cam
What was it?
You are a genius
Thanks 🤓
Hmm I dont think this is my prolem. ine knocks at bite.. No sound otherwise... Hoping its just a loose engine mount.
I have the same problem as I can fix? I replace the bearings and the same problem
Suppose can easily diagnose using scanning tool measure the knock sensor within each piston.
that will only tell you which cylinder has a problem, it wont tell you what the problem is.
@@PoorManMods lots of tricks!once u got wet, eventually u still need to shower 😂
I don’t get it what was the noise???? The squeaking noise or the deep knocking noise
Do you think rod knock makes a squeak, or a knocking noise?
@@PoorManMods not nice:/ I’m not sure because In the video I heard like a low squeak or tapping noise or something but then I heard like one or two loud knocks I’m very bad with this stuff I’m going through it right now living in my van so I’m sorry if I sounded bad?
Sloth?
You can fix that through the bottom if you remove the oil pan? Replace bearing or tighten the nuts? Or do you have to pull the entire engine apart?
In our case the engine had to be pulled. Needed to replace the crankshaft and 1 connecting rod. Its always good to fully remove the engine and have the rods and crank checked if youre experiencing a knock from the main or rod bearing
very helpful and brief. thank you much
Great video. Thank you for taking the time to make it.
youre welcome!
Could this noise be almost gone when the engine heats up? Or is it something else? I hear knocking noise only when accelerating on cold engine, and after 15-20 minutes it's 99% gone
Hmmm hard to tell without hearing it. Could be a lifter issue youre having
Our Kia has similar issue , spun bearing on the crankshaft.
How do I know if I can fix it myself or if the engine is just f*****
Is it normal for rod knock to go away when cruising only knocks on when it’s in park
I have a 2.4 liter turbo. It makes a knock but when I turn the ac off it stops. Should I take it to a dealer? I like the car but it all ready threw a rod. I had to replace it with a 80k used engine. Any suggestions?
The knock should certainly get properly diagnosed and repaired especially if its an engine knock and not something related to the AC pump.
whats the most i should pay for a kia forte in this condition and how much will it cost to fix?
Cool...thanks for the simple test.
Do you have video of fixing cylinder 3
I'm so glad I found your channel. I subscribed. Keep doing what you're doing!
Thank youuu!
LOL MY 07 Camry just got this!!! How long until the engine goes kaboom?
not long at all, it will need fixed/rebuild asap
Could make this a lot easier.. Just start the car and pop off the plug coil one by one and whichever cylinder it is the noise will disappear
All that does is tell you the bad cylinder but doesn't tell you why the cylinder is bad
Thanks for this vid! I was able to diagnose rod knock in my sons car because of it.
Awesome!!!
Hey Fred, what if it's a diesel? ;P how do you do then ? ;)
Check the spark plugs. If they are bent, you have rod knock.
@@therealboofighter oh yea, forgott about those..
you can do the same thing if you remove the glow plugs
That is not alway the case
@@PoorManMods yea i know that, got a vw golf mk1 and a skoda pickup, none of them is doable. 🤔 Any other Suggestions on how to do it then?😎
Hi buddy when i pull up 2 the lights i hear 2 knocks & only 2 that come from the left of the lower part of the engine. What could it b im thinking bearing mayb?
Probably a rod knock unfortunately