My 2008 Yukon Denali with 105K miles suddenly started running really bad. The traction control/stabilitrac light came on at the same time.
I took it to a local shop who said I need to take it to the dealer. They felt possibly it was the fuel pump module (which has physical damage) and a new one would have to be programmed by the dealer.
I drove it a few miles to Williamson Cadillac here in Miami. The service advisor called me the next day and said that diagnostics points to no compression in cylinders 2 and 4. He said that he has seen this before several times with the 6.2 where it is a broken valve spring. However, it would be a week before they can check the engine out fully.
I have always cared for my Yukon with regular maintenance and do not drive it hard.
Obviously the engine is out of warranty but I was wondering how big of an issue is the broken valve and/or spring with the 6.2 non-AFM engine?
I saw one person with this issue on the internet but not much else, everything seems to be related to the AFM engines. I did find for the 6.2 a TSB advising to replace the engine if the intake valve is broken.
I am hoping it is just a simple spring replacement but I know if a valve dropped down and damaged a piston, I am looking at a new engine. I'll keep you guys posted as I find out more. Thanks
---------- Post added at 05:30 PM ---------- Previous post was at 05:02 PM ----------
My apologies, I just realized I posted in the wrong discussion area. Is it possible to move it? Thanks
I took it to a local shop who said I need to take it to the dealer. They felt possibly it was the fuel pump module (which has physical damage) and a new one would have to be programmed by the dealer.
I drove it a few miles to Williamson Cadillac here in Miami. The service advisor called me the next day and said that diagnostics points to no compression in cylinders 2 and 4. He said that he has seen this before several times with the 6.2 where it is a broken valve spring. However, it would be a week before they can check the engine out fully.
I have always cared for my Yukon with regular maintenance and do not drive it hard.
Obviously the engine is out of warranty but I was wondering how big of an issue is the broken valve and/or spring with the 6.2 non-AFM engine?
I saw one person with this issue on the internet but not much else, everything seems to be related to the AFM engines. I did find for the 6.2 a TSB advising to replace the engine if the intake valve is broken.
I am hoping it is just a simple spring replacement but I know if a valve dropped down and damaged a piston, I am looking at a new engine. I'll keep you guys posted as I find out more. Thanks
---------- Post added at 05:30 PM ---------- Previous post was at 05:02 PM ----------
My apologies, I just realized I posted in the wrong discussion area. Is it possible to move it? Thanks
