MERCH NOW AVAILABLE! streamlabs.com/gibsongarage/m... Tutorial on removal, inspection and installation of timing chain and timing chain components Timing set: www.summitracing.com/parts/su... Cam Phaser: www.summitracing.com/parts/ad...
You made a great video. I have a 2009 Chevy Trailblazer with the 4.2 I6 and it just went over 100,000 miles. I am getting the P0017 code and I replaced the VVT and Camshaft Sensor. Still had code so I took it to the garage and they said that the Cam Phaser oil ports are clogged. They say to run Marvel Mystery through the engine and change the oil every 1,000 miles. If they have to replace the Cam Phaser it would be over $2,000 dollars. I'm in the process of running the Marvel Mystery and on my 2nd oil change with Pennzoil. The garage said I might have to do this 4 or 5 times. If you have any helpful ways to go about this problem it would be great to hear. Thanks again for the video.
Stihl Flower thanks for the comment there is a test you can do with the head off you can apply air pressure to those tiny ports that are probably clogged and watch your phaser turn back and forth. assuming all the parts are in good condition if you fail the test those ports probably clogged. there is a video of an old man performing the test on his workbench
The timing chain and crankshaft sprocket were just replaced at 82,000 miles at the Chevy dealer under warranty and under a service bulletin (#PIP4945). So those components should be fine. I have never done work like this but if I could pull the head and unclog those ports that would save a lot of money. I was told that the Cam Phaser keeps the timing chain in line or on the proper timing, is that right? If I didn't have a check engine light I would have no idea that there is a problem because the truck performs perfectly fine. I have just started hearing in the past 2 weeks or so a whirling noise in the coming from under the hood when driving and as you accelerate the nose gets slightly louder. I am thinking about removing the serpentine belt and seeing if its the drive components or the engine. If you have had a similar problem or have an ideal of what it is that would be great to hear. What is that video called with that test you were talking about? I'll take a look at that and see what I would have to do. Thanks again.
HAYeeee Gibson Garage : My 2003 Trailblazer had all the signs of ""jumped time"". It seems though, I can't up-load the photos of my procedure I used to troubleshoot this matter here. I am a Gifted ""Hands-on"" Mechanical Engineer from the farm. I didn't want to dismantle the valve cover as Gibson Garage did. I used a 3" hole saw and drilled a hole, approximately 1/2 way in-between the 2 valve cover bolts to the right of the oil filler cap AND to be sure the hole didn't cut into the TOP FLAT surface of the fiberglass valve cover. The cutting procedure left a dust to simply wipe away with a rag. Using a flash light, I could visually see the chain and sprockets. The Timing Chain and Timing Sprockets were AA OK. Also, after this inspection, I turned the engine over several time and watched the live movement. Even the engine oil was being brought up from the oil pan. My experience on the farm and in industry taught me about ""site glasses"". I made a plexi-glass disk and JB Welded it to cover the hole and I will now, forever, have a ""site Glass"" to check oil lubrication and wear.
I change my oil religiously,always have. I have never had an oil related problem with my cars,ever. Changing your oil is the cheapest thing you can replace on your car that pays for its self in the long run,it really does.
Great video!! I just replaced the transmission on my 07 trailblazer. That was a beast!! I couldn't imagine doing this job haha hopefully I won't encounter this haha great video!!!
I have 270k on my 2002 TB and just now I considering replacing the timing chain, because I am getting a P0014 error even though I have new camshaft position sensor, new VVT sensor, and new oil in it. I may try running some AMSOIL through it a few times before I make a definite decision to do this major job. My TB is running great, but this P0014 error pops up after about 32 miles of driving. I now my oil pressure is fine, because I just replaced the oil pickup tube o-ring, and I have a real oil pressure gauge hooked up. My oil pressure is like a new TB would have.
For the oil pick up that flat gasket is for the 2nd design timing cover and the O ring was for the first design. You have the 1st design, that's why you didn;t have the flat gasket
You know how I get the balancer bolt loose? A socket and a long breaker bar wedged up against the frame, and tap the starter. Works every time. Sometimes saves taking a radiator out as well.
I'm in the process of doing this work now. Although I have the 4x4 version so I have a lot more components to remove. For future reference to break the crank bolt loose just wedge your breaker bar and socket against the frame and use the starter to break the bolt loose. Also there's machined flats spots on the camshaft to keep them from spinning to break those bolts loose. I had to go one step further and replace the head, should've just bought a new motor.
Andrew Darbyshire We all learn that way some time. I find when timing chain or head issues,its just as well to pull the motor and replace,period. I learned that years ago on my 69 Pontiac.
Is used a factory hole in the frame to hook a ratchet strap THROUGH the arms of the Balancer. Tightened the bastard down and stood on the tire to get it to move. Worked like a charm. That said, My break down started with a blown head gasket... Just to get the head off, You have to do the following: Rad fan water pump alternator idler tensioner steering pulley then all of the steps in this video. Just. for. that. ONE. *FUCKING.* *BOLT!* Nearing the mid point of my 4 month project though. Basically just decided that I was going to replace everything that I say needed it since I have no service history on the 02TB. Just need to get that one bolt and drill a few snapped head bolts out...
Idk if what he suggested about drilling a hole in the oil pan would work but I want to warn anyone who does this job that has the 4.2 with a 4wd this is pretty much the toughest job on this engine u have to take the differential and the 4wd acuator and the intermediate shaft out in order to drop the oil pan which has to come all the way off so my warning is if u need it done fast your probably better off taking it somewhere but it can be done it’s just a pain in the arse
Thank you I think this video will help me because I might be pulling the head have a misfire on cylinder number one I think I might have a blown head gasket Because I replace the injectors replace the coil pack they are working the spark was working but still have the misfire code But I will be doing a leak down test to confirm everything
That buildup in the oil pan is from the oil getting heated. It is not from not changing the oil enough. Every Trailblazer/Envoy used oil pan I have seen looked like that, or worse. After 22 years mine had a baked on scale on it, and I changed my oil plenty often enough.
A year ago I was given an 03 trailblazer with a blown engine. It's got a major rod knock now and I just ordered another engine. Thinking I should change the chain before I install the new engine. What a horrible design bolting the differential to the oil pan and having a drive shaft going thru the pan. I would imagine if they went with a V6 they wouldn't have had to do this because the engine wouldn't be as tall
I now own Two of these envoys. I always change my own oil an installed VVT solenoid valve in both 2002 envoy just got from a home owner on the barner system 101,000m and my 2007 Envoy with 169,000m bought with 51,900m so I knew about oil change is very necessary. Timing chain goes you better just let the truck go. Especially if it's 4x4 oil pan has differential axle running thru it. 🤦
I will just call the tow truck and take it to the junkyard. That vehicle I own is 17 years old. I got my money's worth out of it. I bought it used for 6500 bucks. Time to go to the junkyard.
Going to all that trouble I would use nothing but OEM parts. No cheap Chinese junk. Not worth the risk to save a few bucks. I learned that lesson the hard way.
You know they could have put a access plug in the pan to take out that bolt for the pick up tube. I mean really they have two plugs up front to get the bolts out of the tensioner. Would have saved from taking out the pan.
Did thus help with the P0016 code. It looked like the marks were good. You didn't show the harmonic balancer mark though. Were the sprockets bad?? Thank you for any advise.
Thank you for the video, I changed the vvt solenoid and now I have the p1345 ckp/cmp correlation message and about to swap those other 2 sensors. If I still get the same problem I'm either crashing the car and collecting insurance or selling it. I rather change the timing chain on my c5 corvette than the TB wayyy too much labor but god bless you for the informative content!
Yeah I have a P1345 code as well. I just swapped the sensors and erased the codes. I'm praying that the codes is fixed. If it's the timing chain, there's no way I'm going through that trouble. Outside of the code, the car runs like a dream, so if it is the timing chain I'll just drive it as is till it dies.
I have a couple questions, if you don't mind. How do you tell if you have a 1st design or 2nd design balancer setup? Not sure which gasket kit to order. ie: balancer w/o STEP ON HUB (1st design) or balance w/step on hub (2nd)? also, for the variable valve timing sprocket, where do you get the ' cap' that is shown on the video? All the vvt sprockets I look at online, including acdelco's site, shows no 'cap' on the sprocket. You can see at the 18:41 mark of the video. The flat portion with the bolt hole throw it.
As far as the balancer the only difference I knew between the engines were if you had the big Envoy or the small Envoy you could tell the difference by the oil pan it would have places for oil filter adapter or lines to thread into it mine did not it is the short Envoy and as far as the sprocket goes the cap came with it
Set The marks on the sprockets to the dark links on the chain (3) at the same time both cam shafts are set with the flat spots up and the timing is set. Is that how you do it ??? Great video
Wait. Did I miss something? Was there actually anything wrong with the timing chain? Im kinda skeptical now that you cut the "now to see if the timing is off" part. Did you do all of that for nothing?
well, i did the same thing, had code for camshaft position sensor, i changed it and actuator, went to Autozone had them turn light off - it came back and has been for a few months, i know someone with a 'snap-on' scanner, i borrowed it and found the re-learn procedure' it runs great now
hey I have a question the little gasket that comes with the timing cover gasket set. not the round seal for the oil pick up tube do you have to use it or just the O ring ??? I have a hard time putting the tube into the timing cover plate it doesnt go flat and can not push the tube all the way in please advise thank you
How did you remove the top two right side bolts on the pan where it bolts back to the bell? There's an exhaust flange in the way and no way you get a wrench on through the wheel well.
Anybody else cringe when he tapped that timing cover after he pulled it off??? ( I just cracked one on a triton v8 by just pulling it off with 2 fingers). They. Are. Fragile.
It's the phaser that goes bad on the exhaust cam. More than likely the phaser is bad for the P0016 code anyway. I could see when he had the marks lined up the word "Delphi" was on an angle meaning the phaser is stuck in the advance position. When you line up the marks the word "Delphi" that's on that phaser has to be straight .
I have a 2002 trailblazer. The truck has no trouble codes with 250,000 miles. When the engine is cold the engine sounds like new but when warmed up is quite loud. Not a knock or a tick or a grinding sound. Oil psi is good. I think with the miles it's my timing chain but not sure. The truck runs and drives like new. I'd would normally just put W40 oil in it but with the cam phaser it could muck it up. Any ideas?
My mom has a 4.2L 4WD Trailblazer that was gifted to her by my (late) Dad. It breaks my heart for her to have to get rid of it, but do you think it's too late for me to do the timing chain, since the trans and 4WD has never been serviced???? I want to save this car, but I'm afraid the trans will act up later 😬
@@GibsonGarage Hmm, my car is running great, but I have the darn P1345 code that's still there after changing the camshaft and crackshaft sensors. It sounds like I might have this issue :(
@@GibsonGarage Thanks, mine is 4 wheel so would be little more work in the front end area. all vehicles today including them turbo v6's have to have cam-chains replaced...
@@GibsonGarage My 2002 Chevrolet Trailblazer is now 143000 kilometers I've bought this vehicle from other people 3 years ago but after this 3 years that I'm running my Trailblazer I never replaced the timing chain and related parts, My Trailblazer was running well until May 2020 that the car overheat and I stop my car at home and inspect the issue but Radiator, water pump and thermostat are damage and now I have to replace those parts. What's you professional recommendation about the timing change replacement?
Did you have any issues with your pistons striking the valves when it was out of time? My brother just gave me his 2006. He was told it needed timing chain but he let his kid drive it and now the motor won't turn over. I was hoping to find a broken chain jambed up. But now I'm concerned it may be catastrophic since it's a interfering motor.
Joshua Potter no it was only off at tooth and I believe someone did it on purpose to make up for the electrical failures it is still currently having at this point all that's left for me to fix is the ECU
It was the cheapest one I could find on eBay at the time I don't remember the name probably not worth mentioning. you should definitely go with dealer OEM
There's a locating pin allowing it to only go on one way so all you really have to do is torque It there is a hex shape on the camshaft so you can hold it still with a big wrench
@@GibsonGarage thanks. I saw that but I read that it needs to be in the advanced position when installing the chain. I wasn't sure how to make any adjustments to that sprocket
Okay let's think about is this for a minute because that's something I did not think about but I will say I didn't have a problem and I did not do that and my code did clear. So take a look at the back of the cams and make sure the flat spots are facing straight up and with the cams installed do the timing marks line up to the chain?
have a little problem, as I was torquing the timing cover bolts down the center top bolt broke. it was the first one I was torquing down. any idea why?,or how can I fix that?, would it have a negative impact if left as is?, thank you in advance
Jesus Raygoza - reason I thought of it was a few years ago my father and I were rebuilding a motor he asked me to bring my torque wrench over. I had both an inch pound and a foot pound both in 3/8 drive. While I was getting some gaskets together he picked up a torque wrench and set it to 24 and I even checked it but I didn't realize it either that he had the wrong wrench. I just checked the line it was set too. It called for 24 inch pounds and he had the foot pound torque wrench in his hand and set it and sure enough snapped a bolt real fast. Soon as he did it I looked over and the shorter inch pound torque wrench was sitting there. Anyhow good luck on your 4.2. I'm about to do some more to mine today. Luckily it's only a 2wd but still a bitch to work on. I thought PT cruiser Chrysler motors were tuff to do timing on and work on anything under the cover like pump and guides. They're nothing compared to this set up.
BrokenRRT thanks for the info, I should have checked first, I got it running,no leaks yet, and yeah timing is a bitch on these, the amount of work you have to go through just to get to the timing components is a bitch it self. Good luck on yours as well. And thanks again.
The problem was solved after I redid the timing chain gears and everything but the camshafts themselves but turns out I had left a sensor unplugged after all of that and that's why the check engine light was still on as soon as I plugged it in the light turned off and it's been plenty of miles now for the Readiness codes to have calibrated themselves so everything seems to be A-OK for now
warriorpluto I think that was the original problem like the video shows it was pretty stained but after changing everything in running some Marvel Mystery Oil through it it's all good... Until the tranny blew.
Jerrod Whittington I bought them online I don't remember who was the seller but yes they did come with a pickup tube gasket. There are no gaskets for the timing cover or oil pan unless you have the larger Envoy, XUV I think it's called, they have a different oil pan with some sort of oil filter adapter going through it or bolted onto it and that gasket is available at Summit Racing and other places online
Ok. I saw a timing chain kit on line that had valve cover gaskets etc. with it but it was for a 4 cylinder. There is only one chain correct? The kit I found had two chains and only one sprocket. your video didn't show any of that. Wondering what I was looking at. I have the 4.2l l6.
Don’t buy ECCPP products. Especially for timing. Had a auto tensioner and was junk, spring wouldn’t apply enough tension. Bought a coil pack and had misfires. Returned it and got another ECCPP and same problem but less dramatic. Very bad product! Bought a different brand and problem was solved. Great video tho
Brett Willborn it was a bear for sure I ended up getting a large diameter pipe to put through the center and pulled down on it until it gave way after went around it with a thin putty knife and hammered and pryd in every spot possible and peeled away all excess sealant
Gibson Automotive Specialists G.A.S. My timing marks are off by one tooth all the way around ? Any idea . Did it jump . It was real boggy. I have 197000 miles on the truck .
I have a 2004 Isuzu ascender with the 4.2 inline 6 as well. I replaced ever sensor you had to also but check engine light stays on. this was very helpful but fuck I hope I don't have to do all the shit you just did. lol
even after changing a couple parts, you have to use a scanner that can do a camshaft/crankshaft position 're-learn' procedure .. telling the computer there is a new part
