Thermostat And Radiator Flush For Envoy & Trailblazer 4.2L
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- Опубліковано 4 сер 2020
- Thermostat And Radiator Flush For Envoy & Trailblazer 4.2L
Easy Flush & Thermostat To Keep Your Car Running Cool! Keep your car running cool by changing out a faulty thermostat and flushing the coolant. If you've experienced a check engine light with the code of P0128 this may be what you need to do to fix it.
This fix involves a 2005 GMC Envoy SLE with the 4.2L inline 6 engine. The Envoy is very similar to the Chevrolet Trailblazer of the same years.
** I am an Amazon associate. I make a commission based on sales through my Amazon associate links.**
Here's the part I used: amzn.to/30tytxj
ACDelco Radiator Cap: amzn.to/2DaWcK7
www.1roadgarage.com
**This channel is for entertainment purposes only! Do not do what I do. Do not take my advice. I am not a professional. The methods I use may be completely wrong and/or dangerous. Please seek professional help with anything and everything and do your own due diligence (research). Working on cars is extremely dangerous. I am not responsible for any loss of life or limb or property. DO YOUR OWN RESEARCH. THIS CHANNEL IS FOR ENTERTAINMENT PURPOSES ONLY!**
FTC Disclaimer: I am an Amazon associate. As such, I earn a percentage of sales made through Amazon associate links found in the description of my videos and on my website and other places. - Авто та транспорт
Yo Jimbo,
I like how you show your mistakes. That is admirable in my book, because it shows others what to look out for when taking on a complex job they haven't done before. Congrats on another homerun hit.
Also, your able to jam pack tons of good info into only a 10 minute video. I have a feeling, on another channel this would be a 20 minute or more video.
-Chuck
Thank you for the kind words! I try my best to make the videos clear, concise and entertaining.
@@1RoadGarage you vs @Chrisfix round 1.
I've done this exact job a few times now. Next time, remove the battery and battery tray. Tons of room that way, and plenty of room to use ugga dugga power for the 2 top bolts of the alternator, and leave the idler pulley alone. This method reduces frustration and time big time.
A easier way to change the thermostat is to remove the driver's front wheel. Then with a few extensions for your wrench, you can easily remove it.
Dude, you may have just saved my life...
Thanks!
No doubt, he saved mine as well thanks.
Looks like we all need to be watching your videos !
@@artmias5538did this work for you?
@@jamesbarker5262did this work for you?
A ratcheting box wrench set is a wise purchase for you it appears. And, I agree totally on the OEM coolant.
I just did this last week ...it was a fairly simple job .removing the alternator isn't necessary if you go through the wheel well...give that a try next time.
I like your video thanks! I bought a 04 trailblazer for my daughter's 1st vehicle. She noticed it's not getting warm air thru the vents/defrost. I've checked all actuators, heater coil etc. BUT I noticed once I pulled the radiator cap, the fluid was green and not orange as it calls for. The temp gauge was only holding about 120. I believe the thermostat is stuck open so I'm gonna have to replace thermostat and flush the system. Then refill with correct antifreeze. Your video was very helpful. Thanks again!!
Ooh nice your engine bay looks just like mine. As if the car has been in a time capsule for 15 years.
We have a 2006 Envoy owned since being new and everything on the vehicle is a challenge to work on even the oil filter is a pain to change ! Recently I replaced the radiator , fan clutch , tensioner pulley , idler pulley , thermostat and dexcool . What a pain but my $600.00 parts would have easily been a $2000.00 shop bill !
just the OEM fan clutch is at least $1000 at the dealer - and they didn't even do a PCM upgrade on the air conditioner - so it STILL blows hot air after a few minutes of cool AC.
I suggest getting a radiator funnel (one that can hold the liquid and you can burp the air out while running the car and don't forget to run the heater too). One of the best investments I've made. EPAuto fill funnel on Amazon.
Very good video! I remember those days of finding that there were a half dozen other items to remove to get to the one needing to be placed! Now I need to see what it takes to do my 2011 Ford Fusion hybrid coolant and thermostat.
I have a 2005 Envoy, I might have to do the same soon! I did the alternator 2 years ago, and yes what a pain in the tight place. lol 😂🤣Thanks for a great step by step video, new subscriber!
🔥 Another good video Jimmy. But did you know you can actually remove/replace the thermostat through the driver side wheel well, without having to remove the alternator and bracket. You do have to use about 4 feet of socket extensions 🤣 I've changed my thermostat twice on my '04 Envoy (301k miles). Good to see ya back by the way 👍
@@mealarca I know! That was before my UA-cam days 😁
Was it hard getting the thermostat bolts back in?
@@JP-nq5dp If you have a magnetic socket, it would be pretty easy. I had to tape the bolts to my socket.
If Kevin says it believe it. This guy is an expert on the GMC Envoy. He has 300k + miles on his. That makes an expert in my opinion.
@@pontiacsrule8761 thanks for the kind words👍 My Envoy is very close to 350k now.
From page 6-296 (Vol. 1) of the 2002 Service Manual the thermostat housing bolts torque specs:10 N-m or 89 lb in (GMC SM nomenclature)
Finally you’ve been ghost forever
lol He's a major coke head you can clearly see his cheeks all sunken in and the size if his pupils and how energetic he is. He was probably on a major coke or meth binge.
I've pulled many a lower radiator hose to drain the coolant and have yet to be able to do it neatly. And I'd like to strangle the guy who invented those spring clamps, I always replace them with good Stainless Screw clamps on my vehicles. I have found when working on other peoples cars that you need to make sure you put those spring clamps back exactly the way they were unless you are installing new hose to help ensure no leaks. Hoses get harder with age, if you don't get those spring clamps back right there's a good chance they will leak. There is a tool made especially for them, guess I should have bought one 30 years ago. Factory always seems to position those in the worst position to get channel locks on them.
I have started using the Prestone yellow antifreeze in my 03 Chevy pickup, it's compatible with all other antifreeze so I don't have to worry so much about getting all the old out or what I top it of with out on the road. I by the concentrate, mix it 50% in a spare gallon jug in the garage, then put it in radiator to assure I have the right mix.
Same here, replace with screw clamps. In my opinion, if the Hose comes off and it's older than 2 years it is going to be replaces, they are cheap and I am not taking chances.
nice video. i had a similar problem with my 04 trailblazer. when we bought it it kept throwing a check engine light. it was cooling too efficiently. someone replaced dex cool for old green antifreeze. i changed to dex cool and never had the light come on again but the temp runs a few degrees hotter with the dex cool. it still runs good
I drive a 06 Hummer. And mine was running hot so I thought. Only to find out it wasn't. But the temp gauge was saying otherwise. I changed the antifreeze and put dex 50/50. And new water pump. Now back to needle being in the middle. 😳. So I'm assuming the color was right. But they put 100% dex in. Instead of 50/50. I probably should've changed thermostat as well. But no longer have issues feeling like I'm running hot. Gm couldn't figure out why. But I fixed my own issue just by changing the liquid lol
Nice job. Seemed like a big job.
Way to go Jimmy. Excellent video. Thank you. Bill
Hey Jimmy.. I like your drain plug in this video.. smart and cost saving I'm Gona do that as well
Thanks Jimmy. Looking a bit tired there fella. Hope you are well!
Outstanding job sir!
Hope the Mrs. appreciates your efforts.
Good video Jim!
I'm glad I'm not the only one who refilled with dexcool instead of my 2nd choice of toyota pink coolant.
As experience working on older cars to the mid cars today I will agree it is harder to work on them because of the way they change them around and make it hard for you to work on your cars at home I agree with that
Thankfully I have a good set of gear wrenches. Made it so much easier.
Nice video. Thanks for sharing
Nice work!
DeX cool. Blowing head gaskets and clogging heater cores for eternity.
Some types of antifreeze do not play well together, even in small amounts.
I flushed my system out using tap water by draining the radiator, which held what I thought was an incredibly small amount of fluid, ran it, drained it, filled it and repeated until the water came out clear. Then I flushed it several more times with distilled water. Drained it, took a hose off the heater core, put my thumb over the end of the hose, blew into the radiator to get as much water out of the heater core as possible. Then I bought a gallon of the recommended antifreeze, full strength, mixed half with distilled water in a separate jug to make a 50-50 mix, poured a half gallon of straight antifreeze into the radiator to mix with any water left in the system and then topped it off with the 50-50 mix. Tested it a week later and it is good to 20 below.
I actually heard from a couple of experienced mechanics that dex cool itself was designed to eat up the gaskets and stuff overtime. I my self know a thing or two about working on cars. First I was in disbelief that this dex cool theory was true. But then one day, I had to do a head gasket job on my Pontiac mini van. At this point, I never done this before, but I had the tools and repair manual already, so I said bump it, let me give it a try. So because it was my first time actually doing a head gasket job, I started looking at videos on how to torque the head bolts down probably. After watching several videos on this subject, including different makes and models of engines, I realized that the GM 3400 motor head job that I was doing had the lowest torque specs out of all the other model vehicles that I then seen. I was working on a 99 model montana, the manual stated that the torque spec was 37 foot pounds of torque. And then a couple years later it was revised to 44 foot pounds of torque. But most of the other manufactures from Honda to ford had almost double to triple that number. Now we are talking about head bolts here, and gm recommended these lite ass torque specs?. But at the same time, those same engines were notorious for intake manifold gaskets and head gasket problems. The moral of this story is, just know that most of the issues with your car were done by design. So don't always assume the factory recommendation is the best choice 😉.
...here is a little proof that the anti freeze color is not important as one might make it seem. If the color was so important, then why can all cars just use water in the summertime? I'm not saying to use water, because water eventually evaporates, and freezes in the cold, and is no protection against rust. I'm just helping one see that if the green antifreeze been working good for decades with no issue, and then when the orange antifreeze came, it came at a time where Gm model cars all of a sudden became notorious for head gasket issues. It's more to it of course, but that's enough for now to raise an eye brow 🤔💭
thanks for the info John, i will use green then !!
@@rolosaenz ... whatever color you use, just don't mix them together, unless it's the universal kind, that can mix with all colors. If you use green, try to flush out the orange antifreeze first ( that's if it's in there already). They say the chemicals in the old green versus the chemicals in the orange tend to create It's own type of problem. But the universal antifreeze is made to fit with all colors. Use the universal antifreeze if you're just trying to add antifreeze to top off the current antifreeze that's in the car already.
@@johndough4338 Thanks Pal, hey im looking at rockauto , im getting the radiator and upper and lower hoses plus the thermostat, but i dont see the clamps for the upper and lower hoses ? any ideas where to get those ?
@@johndough4338 im looking for the clamps upper and lower hose buddy,. where i can get them ?
@@rolosaenz ... I'm sure any auto parts place like Auto zone, O'Reilly's, pep boy's etc. will have them. Those claps come in different sizes, you might have to get the one that utilizes a screw driver to adjust to it's tightest snub on the hose. You just have to get the one that's physical in comparison with the sizes of the hoses. But I'm sure the guys at the auto parts place will point you in the right direction. Just let them know you're looking for the clamps for the top & bottom radiator hoses.
great job man!!
Great content! 👌
That's ridiculous just to do a thermostat lol
Yeah, all thermostats are pain. Some are easy to get to but all drain and flush take a lot of time.
GMC need to go to the ranch for this thermostat placement 😑
Doing a water pump on those is like a jigsaw puzzle
Wow no drain peacock on the radiator. Another GM cost cutting move.
Actually, draining the coolant by removing the hose like Jim did is better/safer than using the peacock anyway. The peacocks are usually just real cheapo plastic that gets brittle. You remove the peacock and it falls apart when you take it out and then what? A lot of mechanics use the hose over the peacock for that reason.
Petcock.
@@cpscps2679 thank you haha, didn't even notice that it put peacock instead of petcock.
great video! And funny!
For the bolt under the alternator I was able to get mine off with a standard 15mm socket, a swivel adapter, a 3” extension, and a 3/8” socket driver 3:19
that's about what I had to do to get the front driver door handle off! A 1/4 to 3/8 connection to swivel via a 10 mm extension. That 10 mm nut was way unreachable behind the frame inside the door.
I did all this yesterday, what a pain in the ass.
Always working deep in any motor brings a bloody hand! Great job! Do you think it would have been a little easier on a lift from underneath?
6
Since you had the battery unhooked anyway, go ahead and take it out. That will give you a lot more room on the side to get a socket and extensions in there to get to the bolts.
Seen other videos where they go through the wheel well. Do not have to remove every thing, but the 2 bolts.
It was totally easy I just did mine it only took two hours you made it sound difficult 😂
You can access the hose and thermostat housing through the fender well. Drain cock for the radiator is on the passenger side very bottom of the radiator.
Earlier models had rad petcock, then it was eliminated so you have to drain rad by removing the hose.
thanks for the video ! It really helped me to fix my thermostat problem .
is it possible to put a garden hose inside the system to flush the cooling system clean/empty?
What thermostat did you use 180 or 192 ? Great video
Why does this guy remind me of a more sober calm version of Trevor from gta 5😂😂💀💀💀
Don’t you just love the engineers at GM? They seem to make vehicles so difficult to work on you have to take it to a dealer to fix it.
Seems that way for sure!
The only time you take a vehicle back to a dealer is for RECALLS only where they are picking up the tab.
If you can't attempt this procedure then take it to a local garage, NEVER the dealer.
50 years ago, my Uncle worked in an assembly plant for GM. Even back then he said, IF the engineers who design these cars had to work on them themselves, they'd redesign the entire car from, bumper to bumper; when, cars were MUCH LESS complicated to work on!
I just did a thermostat turn your wheels to the left, grab 3 ft of extensions and unscrew the bottom, to replace put grease in your 10mm socket to hold the bolt in place and 🎉
PITA but smart tbh. My thermostat is above the alternator and I spilled coolant all over said alternator, and didn’t give it a thought. Sure enough a week later... you get the point. At least your has to come out 😂 sucks too bc my car is a 2002 and it was the original alternator
Traditionally you always test a thermostat before you install it in on the car since they can be a real pain to install. I wounder how you test that design before you install it? In the past you took a hot plate a container of water and a thermometer. Brought the water up to the temp listed on the thermostat and submerged it. If it opened you took it out and installed the car. If it did not you got another thermostat and started over.
Same way with this one, stick it on a thing of boiling water and watch it open up, or pour hot water down the one side and see it pour out the other.
Not sure it's truly flushed if the block wasn't drained, too. Likely the two fluids are mixed now since there was probably still some pink in there. Whether that's a big deal or not........?
Not a deal breaker.
It is a deal-breaker if they aren't chemically compatible. Engine will be destroyed from the inside.
SO, did changing the fluid CLEAR the code or has it come back on?? Does the code come on a a factory preset mileage??
Easy to get out under the front wheel well with ratchet and extensions
My 2003 Gmc Yukon Denali calls for dexcool too but the coolant is pink which is actually better than dexcool
The pink coolant was replaced it is a OAT type base antifreeze. Personally you can add any type of antifreeze once you flush the whole system. I honestly wouldn’t of added Dexcool back in it too many horror stories from that stuff eating gaskets.
Question, I have some overheating to 221 degrees at times during stop but the lower radiator hose seems cold. Could that thermostat be the culprit?
How much DEX cool did it take to fill up radiator?1 or1 and half gallon
Hope you can answer my question I'm in the process of doing this rn on the coolant of dexcool did you mix it with distilled water ? Or did just pour it in straight no 50/50 dexcool coolant if that made since I need an answer asap please need my truck running also I dont thi k I needed a thermostat change i or coolant change but the coolant got dirty and i bought DeX cool I think the problem I have is the coolant temperature sensor but I can't find it there said it was near the thermostat but mine isn't so I took off my radiator and thermostat off for nothing looming for the sensor if you can please help and hit me with a reply back thanks a ton just subscribe great video
How do I know if I need a radiator flush.I had the car from last winter to this winter and I didn't change the radiator fluid ?
I've done this before a couple times but curiosity led me to this video and a few others like it. Why on Earth anyone would change this hard to get to thermostat and not change that lower radiator hose at the same time (and replace those clamps that aren't supposed to be reused) is beyond me. But everybody with a video on UA-cam reuses the same hose and clamps. Also, running the heater fan on high just makes it take longer to warm up since all you're doing is blowing outside air across the heater core causing the coolant to lose heat to the interior of the vehicle. It's ridiculously easy to change that thermostat if you just take the wheel off and go through the wheel well.
I would have changed the Temperature sensor while you had it apart. It's right next to the thermostat and often causes the "Coolant below operating temperature" code associated with the thermostat.
After 2006 the temp sensor was moved to the other side of the engine at the rear. I was planning on changing both at the same time til I found out they weren't near each other.
Jim like to know how you disposed of the old antifreeze. I would have assumed you had over 3 gal to get rid of after all was said and done.
Just poor it out in that California communist street
Don't throw it away, the dogs love that stuff.
@@ideled I served it at a party and got rave reviews on it's sweet tangy taste but now they are all dead. Don't worry, they weren't close friends, they were democrats!
@@REVNUMANEWBERN I would right in front of a Sierra Club member or a "Karen" just to watch their head explode but thank G-d I don't live in that 3rd world $h%T hole of a state!
Why didn’t you pull out the fan shroud to make it more easier to access?
I'm not only but my last comment that I highly recommend if the car is a pain in the butt to change the thermostat why not buy a water pump at the same time they tell you to change your water pump every 100 and 40,000 miles but I recommend about a hundred miles the reason why the water pump have too many plastic parts on the inside and they're not as built as good as they used to be with aluminum or almost steel parts in them to prevent them from falling apart that's another reason why I highly recommend if you change your thermostat for the first time go ahead and change the water pump in the same process so you don't have to tear it apart and do it all over again and have a bad headache
Have 03 Trailblazer. My coolant was just below the ''neck'''not sure if that is too low. Also, it was a really rusty color, some said that could be bad considering i have a cylindar 4 misfire. It is an orange color, so it might be ok. Anybody know more about this?
Que cuesta ese sensor ? Dónde lo puedo conseguir???
I am in the process of this on my 06 trailblazer 4.2 and I drained the coolant because Q#1 i am replacing my thermostat but the thermostat i got from auto zone didnt have the air hole ,does it have to have the air hole .?...Q#2 I got out 2 gallons of coolant from the drain, bought dex cool concentrate becasue the coolant I took out was redish, is that redish coolant dex cool ???.. do i have to mix the concentrate with distilled water ? Q#3 the left over redish coolant that is still in the engine or wherever can that stay in the engine of do I have to flush it out ?? I have 2 gallons of dexcool concentrate coolant to play need asap thanks guys
The reddish coolant you encountered means that someone did you favor and flushed out the Dex Cool that the Trailblazer originally came with and replaced it with HOAT coolant instead which is more of a pinkish-red color. Dex Cool is Orange and turns brown as it ages. Anyhow, since you are uncertain about what type of coolant it had, you should most definitely do a complete cooling system flush (including heater core) and consider sticking with the red HOAT coolant that was in there rather than reverting back to Dex Cool. If you do want to consider switching back to Dex Cool then l highly advise you look in to the Dex Cool issues before committing to that. As far as the thermostat goes, l would highly recommend that you stick with the OEM part rather than going with an auto supply store miscellaneous brand as this is one of those parts that you don't want to play a gamble with and continuously have to replace because of the labor involved. In some cases you can find out who the OEM part is actually made by and purchase it direct from the part manufacturer so that you don't have to pay the dealership mark-up. lt's scary to think that an aftermarket parts manufacturer would fail to include a weep hole in their version of a water pump, but I would not install an aftermarket water pump that excluded a weep hole on any of my vehicles since the function of a weep hole is important. The weep hole is intended to allow extra lubricant from the pump bearings to drip out of the water pump housing. Without this hole, the oil would be forced past the water pump seal and get into the engine coolant. The hole also allows coolant to escape the pump housing instead of being forced past the oil seals to contaminate the bearings. The way you can tell if a seal if about to fail is by checking the weep hole to see what is coming out If oil comes out of the weep hole, it means you have a blown or failing oil seal. If, instead, water or anti-freeze leaks out of the weep hole, then you have a leaking internal water pump seal in the case.
No radiator flush fluid?
Was the thermostat a part of the housing?
Yes
do a coolant flush on the 95
Coming up
Ah dex-kill....... hate that garbage!
The torque especs is 11
So you know you can go thru the drivers side fender well just remove the tire and do this job much easier and quicker.
Yeah my dad and i had to removed the altnator out of 02 corolla to change the thermostat.
Did my 03 Envoy straight 6 thermostat not a problem and GM normally doesn't put in the wrong coolant from the factory
in norway it is EASY to find orange coolant! why not use more expensive coolant without water afterwards.
Sweat and blood the way to go 😂😭
Its pronounced "pain in the a$$" btw...
All jokes aside thank your for making this video
Am I the only one with an 02 envoy The thermostats on the other side of the motor
👍🏾👍🏾👍🏾👍🏾👍🏾
Why does this site give me more than one option, when I put exactly what I was looking for in my vehicle
That'ds funny I just did this job and cut my hand in the exact same spot
Go thru the fenderwell for the altermator bolt
yes it is important to change the coolant after a few years since it breaks down with age and does not protect as well against rust and cold
I'm stranded on a lonely road and mostly COMMERCIALS.
Useless engineers that can't design practical engine bays
Force you to take it in to the dealer for a good wallet vacuuming.
Great DIY by the FBI agent from the ozarks.
One other thing to add to my comment if you decide to change your thermostat in a vehicle from 1998 to 2017 I would also recommend not only changing your thermostat every year but flushing your radiator out every other year to prevent overheating issues
Those envoys came with pink fluid from factory. Bought one new in 06
of course it's a pain in the neck thats because its made my GM. I can change the thermostat on my sequoia in 5 minutes without removing anything even though i haven't had to because toyota is so reliable even with 300,000 miles. still a fan of the channel though lol.
I am not looking for an option other than an Envoy. Instead I get an Envoy and a Trailblazer. The locations of of the video is different than the locations of eachother.
it's called Dex kill for a reason , someone did you a favor , should have kept the pink stuff. Literally all my GM vehicles have had gasket problems from Dex Kill. All my thermostats are gummed up or corroded, it eats intake gaskets also!
We are all victims of poor engineering......some of this stuff being manufactured these days is beyond belief.
Maybe that pink liquid caused thr termostat to fail.
What a terrible design! No way to do this without making a slobbing mess. Don't be overly picky about coolant. The color indicates that it has had a universal coolant in it and has mixed. You took it back to the crappy seal busting plastic swelling gasket eating orange death dexcool on a 15 year old vehicle? uhhh ok.......
Made that alternator way harder than it is . Take the bracket off whole way first
All you really had to do was take the driver side tire and get it from underneath. Your doing to much 😒