What would you do? Truck Needs Engine?

[Seamus]

130K is low mileage for this motor. Known issues are always a lifter, or a gummed up valve from the DI system. So if a a valve is slightly stuck open it will have low compression. I will bet 99% the bottom end it perfectly fine. To do a lifter, heads are coming off anyway and and when you see the back side of those valves you will not believe it. Get a second opinion. An AFM delete with a new cam and lifters and walnut blast the backside of valves and it will go over 300K easily.

 

[2015Yukon]

Incorrect cam timing will cause low compression numbers also. So if it does have a stretched timing chain and did spin a lifter, it still would all be fixed by a proper afm delete kit with cam... Assuming it didn't send a ton of metal through the system.

 

[tooleyondeck]

+1 for having another shop (preferably a performance shop IMO) look at it. If you do end up needing an engine swap, go ahead and upgrade to an L86 6.2L and delete the AFM before install and you’ll be good to go for the long run plus gain value with the better engine.

 

[adamztrucking]

Your 2015 Yukon SLE (130k miles) shut off while driving, and after towing it home, you got a P0335 code (Crankshaft Position Sensor). The dealer now says you need a new engine, suspecting a stretched/skipped timing chain or a spun lifter. You've been quoted $8.7k for a used engine, but you might be able to fix the timing chain or lifter and do an AFM delete yourself to save money.

Key considerations:
- Get a second opinion on whether it's just the timing chain or lifter.
- Weigh the cost of repairs against the trade-in value ($10k if engine were fine).
- If the truck is in great condition, fixing the issue could add long-term value.