Here is the playlist for the rest of this series:
https://www.youtube.com/playlist?list=PLAFYVCyenqcoTvkbvE6avGuLJOQnFcx4Z
My apologies that I did not upload this sooner.
For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium right here on YouTube. There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!
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great vid. mine is in the dealer as we speak… mine was leaking oil up through the breather hose in back part of the engine that goes to the airbox. sounds like a minor fix right? lol
I see that all the time on those soft MAZDA heads. They get a hot spot and the alum sags in that area causing a leak. If that area cleans up last when you cut the seat that is pretty much the same thing
so I suppose if we follow the rabbit down the hole. Long term it explains why these engines eat up catalytic converters. Because if the intake(air/fuel)valve is constantly bleeding air into the cylinder that's going to make it run lean, and lean means extremly hot exhaust gas, excessively hot exhaust means melted converter, broken exhaust manifold bolts at the head, ect.. It all makes sense now. Thanks scannerdan, great series, subscribed!:]
just had the head replaced by a chevy dealer they said #2  wasn't seating properly charged my 2600 had my truck over a week got it back still feel a vibration in the truck when sitting at idle any thoughts on what it is? dealer told me it's an 06 not a 2017 lol
just had the head replaced by a chevy dealer they said #2  wasn't seating properly charged my 2600 had my truck over a week got it back still feel a vibration in the truck when sitting at idle any thoughts on what it is? dealer told me it's an 06 not a 2017 lol
Great videos Paul! Many thanks for all your effort! It seems to me that the valves are also slightly bent, caused by an incorrect heat distribution along them, for using a "not so great quality" material…maybe? Just a thought. Anyways, keep doing what you`re doing man, you really are a very good technician and a great teacher too. Thumbs up!
@ScannerDanner for president
So how does one that's looking for a used h3 detect whether the ones you're
looking at have this issue?
What should you expect to pay to have a new and better head installed with
new valves and springs?
Are weak/cheaper/poorly designed valve springs ever part of the issue?
This is not a correction that could typically be made by a non mechanic,
owner probably ?
what was the total costs of this repairs?
Great find Paul brilliant work
Very nice, them look like hot spots in the seats that caused the valves to deform the seats. Seen that several times.
did you rebuilt the head or did you buy new one gm has update head with harder valve seatsreason I was asking you mind at dealer now they want do valve job on it
Two weeks ago, I fixed a 2006 Hummer H3 with this exact same problem. I noticed that there is TSB for this problem. By watching your videos, I felt very confident performing the job. Thank you ScannerDanner.
I can see it, thanks for the info.
When are H3 owners going to file a class action against GM, I and many others are having this problem and it dont look that easy to fix.
fuuu, thumbs up for not giving up!
Too little cooling in the center of the head. Wall between intake and exhaust overheated and warped resulting in the non contact area. Design has a metal fin between intake and exhaust without a proper thermal path to the coolant.