2013 Yukon Engine Knock...

[jmo2610]

Let's just say this is outside my skill level, what would you guys estimate this would cost at a shop? We looking at $2k? $5k? I really have no barometer on the cost of this repair.

 

[gooffeyguy]

@Doubeleive is or just had this done I believe

 

[Doubeleive]

Let's just say this is outside my skill level, what would you guys estimate this would cost at a shop? We looking at $2k? $5k? I really have no barometer on the cost of this repair.

The estimate my dealer gave me is approx $3k give or take a little depending on what all I end up doing, that's for the whole left bank 8 lifters. I opted to have the head resurfaced and will probably do all new rocker arm springs since it's all apart already

 

[Doubeleive]

A independent shop had given me a estimate of $2400, but I opted to take it to the dealer just because I trust their work better and I get a 2 year warranty

 

[Trey Hardy]

Put a quart of marvel mystery in it for ***** and giggles get in it hard like hold it to 5-6k rpm for a min drive it 20 miles and see if it clears up I got two lifters unstuck in mine like this

Hi friends. 2013 GMC Yukon XL Denali 6.2L V8. I recently had a check engine light for a misfire on cylinder 6, and could very much feel the misfire. Changed the coil, no fix. Changed the spark plug, all is well! 3 days later, I have this engine knock happening. No check engine light, however! Pretty obvious power loss right around 30mph. Am I about to need a new motor? Why would the check engine light NOT come on with this happening?
Video of knock at the youtube link. First part is stationary, second half of the video is driving. Minute and half long.

Thanks for anyone's help.

 

[Dustin Jackson]

@jmo2610 The hard part is finding a shop that will fix it right or remove AFM completely. I've heard too many stories of someone spending $3k+ to have the same problem immediately because the AFM system wasn't removed

 

[Trey Hardy]

If your tearing it open I suggest deleting that junk it’ll make the motor last a lot longer then going with the afm stuff again

 

[jmo2610]

Put a quart of marvel mystery in it for ***** and giggles get in it hard like hold it to 5-6k rpm for a min drive it 20 miles and see if it clears up I got two lifters unstuck in mine like this

This kinda sounds like a "hold my beer" idea where you end up on a fails video and a trip to the ER .... that said, would there be a detriment to trying this? Like what's the risk of screwing up even more stuff?

 

[jmo2610]

The estimate my dealer gave me is approx $3k give or take a little depending on what all I end up doing, that's for the whole left bank 8 lifters. I opted to have the head resurfaced and will probably do all new rocker arm springs since it's all apart already

Well, as gross as that is, it beats the YouTube video I just watched where the dealer quoted $7500, and the guy spent over $1800 for parts and fixing it himself.

 

[jmo2610]

If your tearing it open I suggest deleting that junk it’ll make the motor last a lot longer then going with the afm stuff again

Don't you have to change out a lot more stuff to do that? Like the camshaft and such?