2007 Chevy Tahoe Engine Part 4, Dissection - EricTheCarGuy
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Күн бұрынLink to full version of this video: www.ericthecarguy.com/vmanuals...
Link to part 5: • 2007 Chevy Tahoe Engin...
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So this is it kids the 5th and final installment of the Tahoe engine series. I was a little surprised at what I found but I'm happy to know for sure what happened, have a look and see if you guessed right.
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@chrismilliken9077 9 жыл бұрын
I am working on a 2007 chevy 5.3 right now. it was missing on Cyl #4, due to a collapsed lifter. this was caused by dirty oil. the owner put off doing an oil change. the filter got so dirty it went into bypass and sent all that dirty oil to all the lifters. 4 out of the 8 AFM where stuck and not operating. Total parts wholesale plus valve job is at $1500 just in parts. Decided to do a complete engine swap. New engine $2800 3 year 100000 mile warranty. Just cant guess how bad the bearings where damaged. Moral of the story: Clean oil and no Fram filters!!!!!!!
@ericthecarguy 13 жыл бұрын
@lobsterscope I'm glad you took the time to read through the comments as this video has been the subject of much debate. I still have the engine as they never came to pick it up so I might make a video of the actual measurements of the cylinder bore, it will probably be some time before I make that video however. Thanks for your comments.
@ericthecarguy 13 жыл бұрын
@beefystik I loved having Duane on the show he was great. Thanks for listening and for your comment.
@ericthecarguy 13 жыл бұрын
@weatherbyking The coolant gets in as a result of removing the head, the head gasket was fine. I did not observe any cracks at least any that were visible. Thanks for the comment and your observation.
@ericthecarguy 13 жыл бұрын
@KillerZero259 Feel free to buy as many as you like but I just appreciate your viewership and your comment, thanks.
@ericthecarguy 13 жыл бұрын
@mrjost55 The other cylinders were not so great either as I showed in the leak down video, between that and the obvious lack of maintenance on this engine I would have to agree. Thanks for the comment.
@ericthecarguy 13 жыл бұрын
@joe2mercs They could have also moved when it popped out. I've actually made yet another video on this as I would LOVE to put it to rest. Thanks for your comment.
@ericthecarguy 13 жыл бұрын
@situationmoney I think your onto something there. I've never seen a localized compression loss like this but I thought the same thing that if that one part of the bore were defective the rings might naturally move to that position and cause the compression loss. Thanks for your comment.
@ericthecarguy 13 жыл бұрын
@Kapvoum The latter, I believe the cleanness of the cylinder was due to a lack of compression. You present the most plausible argument yet on this engine in my opinion. Since I still have the engine one day I'm going to open it back up and do some measuring to see what kind of shape it's in and put this to bed for good. Thanks for your comment.
@ericthecarguy 13 жыл бұрын
@68ray That is the theory yes, the excess heat would cause the bore and ring lands to wear prematurely thus making a bigger hole for compression to slip past. Thanks for your comment.
@ericthecarguy 13 жыл бұрын
@TheTexasCoder Thanks for weighing in Patrick, always good to see you in the comments.
@ericthecarguy 13 жыл бұрын
@805ROADKING A couple of people made comment to the effect that after the oil rings froze it assisted the rings in lining up and contributing to the problem, I find that a little more plausible than the rings being lined up like that for 130K. Thanks for your comment.
@ericthecarguy 13 жыл бұрын
@cov01crew I was taught never to align the rings during assembly. it is true that they will rotate during operation but you try and decrease the likelihood they will line up this way.
@ericthecarguy 13 жыл бұрын
@1PossumJenkins I understand where you are coming from but keep in mind that I have other cars to finish and a phrase about a 'dead horse'. Thanks for the comment. I may end up doing it anyway just to put this thing to rest even though it means pulling the head back off.
@ericthecarguy 13 жыл бұрын
@CanadaClip You need to watch the leak down video as I go over the diagnosis of this problem as well as a test on another cylinder on the engine which was also down. It may not look like it but the fact that the oil control rings were frozen indicated a lack of maintenance that would rule out the possibility of just addressing the one cylinder.
@ericthecarguy 13 жыл бұрын
@tinydx95t2 I thought broken rings based on the evidence from the leak down test which indicated a compression leak into the crank case. Thanks for your comment.
@ericthecarguy 13 жыл бұрын
@EricWaterTruck Yea that was a surprise. I did put it back together just enough to send it back to the yard as they are coming to get their core.
@ericthecarguy 13 жыл бұрын
@amiperez I hope to do that as well, thanks for your comment.
@ericthecarguy 13 жыл бұрын
@groutaone I appreciate your 2 cents as I value your opinion. To be honest I think the ring thing is a bit thin myself but I really can't think of anything else that could cause a localized compression loss like what was there, it would be really weird if the bore were out of round in just that one spot. Looking back I wish I would have put the rings without the piston in the bore and stuck a feeler gauge in there to see what was going on.
@ericthecarguy 13 жыл бұрын
@DIYautotech Yea that would be cool but I'd have to buy one. While editing I thought it would have been nice to put one of the rings in without a piston just to see if there was a gap there. Thanks for the comment.
@ericthecarguy 13 жыл бұрын
@mss829 There really was no good cylinder in this engine but looking back I'm wondering if I had put a ring in the bore without the piston if I could see a gap in the spot where the compression was going. Thanks for the comment.
@ericthecarguy 13 жыл бұрын
@RRasmus If that was the case it would have shown up during the leak down test. See part 5 and thanks for your comment.
@ericthecarguy 13 жыл бұрын
@trbfshmn I think the oil rings froze up due to lack of maintenance but I suspect that it was the rings lining up that contributed to the compression loss based on the evidence inside the cylinder wall and the fact that it seemed the rings were lined up after removal.
@nickb4302 10 жыл бұрын
If the discoloration on the cylinder wall was caused by the ring gaps lining up the rings obviously must have turned when he pulled the piston out. If you watch the video when he pulls it out and turns the piston the gaps are located over the wrist pin. The discoloration is 90 degrees from where it would be if those gaps were lined up in the spot they were in when he pulled it out, which was over the wrist pin.
@ericthecarguy 13 жыл бұрын
@chevyshaun454 Yea to be honest I'm a little confused on this one too but I have no other plausible explanation as I've never know cylinders to have a localized out of round like that, weird. Thanks for your comment.
@ericthecarguy 13 жыл бұрын
@pit31bike110 That seems like a bit of a stretch but thanks for your comment.
@ericthecarguy 13 жыл бұрын
@Begbucks I think you might be refering to my hose pliers. The engine is a core and headed back to the yard where the new one came from.
@ericthecarguy 13 жыл бұрын
@FaithfulAndTrue100 Rings break for a variety of reasons but mostly because of heat fatigue. As for diesels it's a different engine design entirely but also consider that those trucks and engines get regular service which is huge for the longevity of the engine.
@ericthecarguy 13 жыл бұрын
@4G63PWR Yea, it's weird but the evidence seems pretty conclusive. Thanks for the comment.
@ericthecarguy 12 жыл бұрын
@snowmangaggift Anything broken that is suppose to seal the combustion chamber from the valves to the head gasket to the rings and everything in between. Bearings are there for the rotating assemblies NOT to seal the combustion chamber. You might want to check out the engine dissection video that I did for more info on that. See the Civic engine video #5 for the effects of bearing problems.
@ericthecarguy 13 жыл бұрын
@evilperson86u Your always better off buying used if your looking to save money as doing a proper rebuild requires special tools and buying an engine in parts is way more expensive than buying a complete unit. Don't waste your money on synthetic oil, you would do just as well with regular oil and change it on a regular basis. Thanks for your comment.
@ericthecarguy 13 жыл бұрын
@CargoInk The problem with that is that people would stop buying cars and I think the car companies would have a problem with that, in fact I dare say that some companies make cars and engines last just so long by design aside form that the service cost would be through the roof for something like that to happen in the automotive world, neat idea though. Thanks for your input and comment.
@ericthecarguy 13 жыл бұрын
@bossthadal I don't think so. The best way to maintain an engine is do just that, change the fluids regularly and keep it tuned up according to factory spec, do that and you shouldn't need anything else.
@ericthecarguy 13 жыл бұрын
@GrandDanois No they don't and they do 'spin' during operation by design really the idea is to space them in such a way during assembly as to make it less likely for them to line up.
@ericthecarguy 13 жыл бұрын
@mixwell1983 Simply put, no. Did yo see the leak down video where this engine was diagnosed? If so you will know the rest of the engine is in pretty rough shape as well. Lastly you can't just put rings in, it's a matter of tolerances, the tolerances in the cylinder were compromised so you would need to send the block to a machine shop to be bored out and larger pistons installed to truly fix it.
@ericthecarguy 13 жыл бұрын
@pjvenda The water idea is too far fetched, I go by the rule of KISS, water bends connecting rods, doesn't damage rings. I believe the rings lining up was the cause of the compression loss, if nothing else I believe the evidence on the cylinder wall said exactly where the compression was going. Thanks for the comment.
@ericthecarguy 13 жыл бұрын
@eleeter If it were loosing coolant due to a crack or head gasket failure it would have shown up when doing the leak down test, the cylinder was clean because it was loosing compression not due to coolant. To be honest I've never seen anything like this but the fact that the leak down said the compression was going into the bottom end and the discoloration on the cylinder wall was enough for me to call it.
@ericthecarguy 13 жыл бұрын
@MikesFitnessGoals I admit the ring alignment theory is a little thin but I don't buy the coolant getting in there as I saw no evidence of that as it would have showed up during the leak down. I just can't think of anything else that would have caused a localized compression loss like that.
@ericthecarguy 13 жыл бұрын
@EssedariusMaiestas Someone below made a comment about this that made sense and that was that when the oil control rings froze it allowed the compression rings to line up and cause the problem, I found that to be an interesting theory.
@ericthecarguy 13 жыл бұрын
@1PossumJenkins Well that's the reason I ran straight shop air into the cylinder to verify my suspicions as I believed my tester was a piece of crap. As for ring gaps it's not good practice to line them up when installing them and there have been comments below stating that once the oil rings freeze up it is possible for the rings to line up and cause a problem like this. For me the evidence on the cylinder wall speaks for itself.
@ericthecarguy 13 жыл бұрын
@dandim23 In the end that will have 4 videos covering that saga, it's next on the docket.
@ericthecarguy 13 жыл бұрын
@jvjong1 Civics don't have vacuum mounts but I am doing a video on that cars engine replacement.
@ericthecarguy 13 жыл бұрын
@grumpydumper Not sure why as I thought it was pretty conclusive where the compression was going based on the leak down findings as well as the discoloration inside the cylinder. What else would you look for?
@ericthecarguy 13 жыл бұрын
@emilkvicktube You might want to try a power balance to see if the ignition system is functioning on that cylinder, I find coils often fail when heated. Given that the plug is wet with what I assume is gas you might want to see if the spark is there on that cylinder.
@ericthecarguy 13 жыл бұрын
@JTheGuitarPlayer Evidence speaks for itself, thanks for the comment.
@1fnjo790 7 жыл бұрын
I think it's a collapsed AFM lifter
@ericthecarguy 13 жыл бұрын
@gmingfreak13 I don't know for sure but I thought that axle bearings are normally pressed onto the axle, I could be wrong.
@ericthecarguy 13 жыл бұрын
@Warkhan No, it is a core that needs to go back to the yard where the new engine came from.
@ericthecarguy 13 жыл бұрын
@vipermech If it were a coolant loss would that not have shown up during the leak down? I'm a little confused on this myself but how else would you explain the discoloration on the inside of the bore in that one location? I think the piston was clean because all the combustion was going down the cylinder wall and therefore not allowing for complete combustion.
@RamblinAround 13 жыл бұрын
You sure had that apart pretty quickly. I agree with your diagnosis on this one. I noticed those ring gaps when you pulled it out. Nicely done......great vid!
@ericthecarguy 13 жыл бұрын
@TheArson7 I doubt she could cook up that fish. Thanks for the comment.
@hobieslug45 13 жыл бұрын
@groutaone your right about that wide mark when the rings compress in the cylinder the gap goes down to about .002 or so ( tight fit ) but if the cyl wore to oblong wouldn't there be a lip. The piston came out pretty easy
@ericthecarguy 13 жыл бұрын
@revitup1965 Couple of problems with that theory. If the head gasket had failed it would have shown up during the leak down test (that was actually the first video in the series) and if the gasket was the problem you wouldn't have the discoloration in the bore BELOW where the head gasket is.
@crx350x1 9 жыл бұрын
a (cleaner) cylinder usually means coolant is getting in.
@ericthecarguy 13 жыл бұрын
@Hondatech26 I try but it's getting harder and harder to be honest but I learn just as much from the comments at times.
@ericthecarguy 13 жыл бұрын
@jozzu Volvos are fun cars perhaps I'll get one some day and make some videos on it.
@ericthecarguy 12 жыл бұрын
@s10kid100 I still think it was rings but I'd like to measure it and see for sure.
@ericthecarguy 13 жыл бұрын
@happy543210 I saw that but it's the only explanation I can offer, they may have moved when the piston came out but the fact that they were so close together is suspicious.
@RedWhiteAndBlueVideo 8 жыл бұрын
Eric the car guy If that suburban has the same chassis as the Silverado, which I believe it does. I loosened the exhaust from the manifolds. And the muffler flange, dropped the crossmember and took the whole, y-pipe out, when removing my trans. At first this almost stopped me as I am just a DIY garage mechanic, got it out with the help of my 72 yr old Dad. "Thanks Dad" we maneuvered it out fairly easy. Except, I wrecked an O2 sensor wire on the passenger side. Possibly may have done after it was removed, I had to drill out the broken muffler flange bolts. I heated the manifold bolts with Mapp gas. I got the trans swapped, but I had a trans Jack and my Dad once again helped with the T-case. Somehow I cracked the t-case mating flange, on the tail housing. I still put it together and everything is fine. I did get a t-case gasket, and Autotrac fluid from GM for my automatic transfer case.
@ericthecarguy 13 жыл бұрын
@POORIGUS It might have moved when it first popped out. This engine goes back as a core.
@ericthecarguy 13 жыл бұрын
@evilperson86u On regular everyday cars yes as the only benefit that I've seen is extended oil changer intervals.
@Yophillips3272 8 жыл бұрын
Cleanest "blown" engine I've ever seen.
@ericthecarguy 13 жыл бұрын
@nightmathzombieethan I sold the Integra last fall and the engine goes back as a core but I like the way you think.
@ericthecarguy 13 жыл бұрын
@petergriffintubin Good eye but that is an alignment mark it's on all the pistons.
@ericthecarguy 13 жыл бұрын
@fordfan855 I hope to broaden my horizons in the future with more makes and models cause not everybody drives Hondas for some reason.
@ericthecarguy 13 жыл бұрын
@sophocha ANY engine you want to space the rings so that they don't line up.
@happy543210 13 жыл бұрын
Hello Eric. if you look at the piston close-up, the ring gaps are 90 degrees from the piston skirt. On the block, the discoloration is right where the piston skirt should be.
@ericthecarguy 13 жыл бұрын
@30GB Watch the leak down video and find out why that really wasn't an option, not to mention part 1 of this series, did you see that oil?
@ericthecarguy 13 жыл бұрын
@James1toknow You might want to watch the Leak Down Test video I did as I cover the diagnosis of this problem. Are you sure you have a carb on your Sonoma? If I'm not mistaken it's a TBI injection system that may look similar to a carb.
@ericthecarguy 13 жыл бұрын
@donbehatin Odds on one side evens on the other man, it's even stamped on the intake if I remember.
@DIYautotech 13 жыл бұрын
I suspect that by the discoloration on the cylinder wall & by the mis-alignment of the piston rings that both had contributed to the compression loss. I'd love to see a dial bore gauge used on that cylinder to see how many thousandths out of round the cylinder is. Great find Eric. Keep it up!
@ericthecarguy 13 жыл бұрын
@spelunkerd Great comment, thanks.
@ericthecarguy 13 жыл бұрын
@trbfshmn It varies, most manufacturers outline how they want the torque set in the service manuals.
@flightmaster178 9 жыл бұрын
I guessed right!!! I noticed the ring position when you pulled the piston and thought, "I could have sworn they are supposed to be 180 degrees apart." Lol thank you Eric for the video!
@mikegilmore8998 8 жыл бұрын
+Brenndon McGill I can verify this. I have a 2007 Suburban that had the same problem. It was consuming 1.5Qt every oil change and was detonating badly. Dealer wasn't surprised when I brought it in. Plugs were all fouled. Dealer rebuilt the engine with new, redesigned rings to correct the problem. The issue ended up being a high pressure situation in the cylinders that are shut down during AFM, causing oil blow-by. Anyway, pretty much anyone with these engines within '07-'10 (I believe) range will have issues, unfortunately. Prepare for a rebuild or if you don't love your truck, get rid of it.
@ericthecarguy 13 жыл бұрын
@RandallFlaggNY Good call!
@joeylor8289 6 жыл бұрын
Eric, the rings may not be broken but they could had failed. I tore down an Acura b18c1 engine that was burning oil. the engine block was upside down on an engine stand and the piston on cylinder 3 slid out after i took off the rod cap. so i concluded that the piston rings had failed for that cylinder, causing me to burn oil.
@ericthecarguy 13 жыл бұрын
@SuperBrandango I consider the "Leak Down Test" video part 1 in a way.
@ericthecarguy 13 жыл бұрын
@hobieslug45 If it were a head gasket problem it would have showed up during the leak down. Also the evidence inside the cylinder wall was well below the head gasket.
@rhkips 12 жыл бұрын
You're pretty much spot-on, there. I saw what looked like scratches/grooves in the cylinder wall, and if those were already there, then that can very easily spin the rings over time. The inertia of gap blowby can help finish the job, too. The brown spot is a result of combustion gases passing through the rings, and the color of the oil looked like combustion gas/fuel contamination to me.
@ericthecarguy 13 жыл бұрын
@jayguy173 Interesting I'll have to look into that, thanks for the input.
@ericthecarguy 13 жыл бұрын
@365bigjoe Watch the leak down test video as that is really video #1 in this series.
@Rezikrisp 13 жыл бұрын
@emilkvicktube depends what it's wet with, a misfire will cause gas to accumulate in the cylinder so that is a possibliity. If this is the case then you are missing either compression or spark-assume fuel and timing are good cause of wet cylinder and misfire code for only one cylinder. If it uses Coil on Plugs, try switching them and see if the misfire moves to another cylinder, if it does, replace the coil.
@ericthecarguy 13 жыл бұрын
@Vlaskha Couldn't say really as all engines are taken care of differently and live different lives but over time parts ware out and in the case of piston rings they don't seal as well and over time will loose compression as a result which equates to a power loss in the end.
@ericthecarguy 13 жыл бұрын
@RamblinAround Thank you!
@mss829 13 жыл бұрын
@EricTheCarGuy well, what I mean was any cylinder because I would think that they all had more compression than no. 6! nice thought about checking the ring in the bore! what if you could not see the gap? I would be trying to cover the inner ring hole in a dark room and shine light through the cylinder since I don't have many tools!
@CoolasIce2 13 жыл бұрын
@MikesFitnessGoals I have to agree. IMO the clean piston top is a dead giveaway that coolant found its way in there. IMO lower compression wont cause that. There has to be another reason for the low compression. I'll go back and watch the first vid of the comp test.
@132madmouse 11 жыл бұрын
it is not a head gasket, my guess (without seeing it) maybe a bad valve/seat? I had a 2005 5.3 exhaust valve seat fail at 165K. But without hearing it run, or being the one to rip into the engine, it could be several things. Weird that it is so clean on the inside with an issue bad enough to necessitate an engine replacement. Love the channel
@scej79 12 жыл бұрын
I started watching these videos hoping to see under the intake just under the oil pressure sensor. My trailblazer lost oil pressure, and I was told from the dealer that an oil screen or filter is clogged under there somewhere. Mechanical oil pressure gauge was hooked up to it and the oil pump is working fine.
@jvjong1 13 жыл бұрын
Thank you for your videos. I would like to see how you take apart and check the weird rear engine mount in that white honda you have in the back there, the one with a vacuum hose connected to. Is an engine lift necessary to do it?
@Jerroh6 2 жыл бұрын
Thanks for the knowledge. I would love to rebuild a 5.3L to put in my 2005 Yukon. Unfortunately I live in an apartment lol.
@ericthecarguy 13 жыл бұрын
@foxdmulder Yes they will but to be honest I haven't run into anything like this in the past.
@ericthecarguy 13 жыл бұрын
@mecanicman66 That would have shown up during the leak down test and if it had I would have just pulled the heads instead of the entire engine.
@ericthecarguy 13 жыл бұрын
@AtomicDouche Sorry but there really is no physical way that a spun bearing can cause a compression loss.
@ericthecarguy 13 жыл бұрын
@jtech23 Thank you very much for that as I've never seen anything like this and was curious about a cause as I didn't think they would have stayed lined up for 130K.
@srissy007 13 жыл бұрын
Awesome series man! You came, you saw, you worked, You kicked it's butt. Thanks.
@ericthecarguy 13 жыл бұрын
@h4xx0r666 Awesome, send pics. Thanks for the comment.
@ericthecarguy 13 жыл бұрын
@POORIGUS Offer me another explanation based on the evidence here. Don't say head gasket as that did not show in the leak down and the discoloration is far below the gasket surface inside the cylinder.
@tlebofsky01 8 жыл бұрын
I did have a collapsed lifter and a bad misfire and low compression. Oil pressure sending unit also had a clogged screen.
@BABYGODZILLA2009 13 жыл бұрын
Hi Eric, you are the god when it comes to Engines!!! great work and thanx for sharing your thoughts and teaching us the correct ways to deal with engines!!!
@pjvenda 13 жыл бұрын
Thanks for the dissection and forensic investigation. With 0 authority and experience except for curiosity, interest and self-taught "mechanical" knowledge I also noticed the ring gaps being too close and the spot on the cylinder bore. One question that's left in me is: Is the spot cause of consequence of the problem? We could argue that something might have damaged the bore (knocking, water, X) which led to the pressure loss and eventually the rings moving. Or was it the other way around?
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