Hey all! New member here and I really appreciate all of the threads on various issues. Has helped me tremendously on previous repairs.
I have a 2007 Escalade AWD with the 6.2L. Recently while getting on it and accelerating on the freeway the engine straight up popped and had instant loss of power. Check engine light flashing and stabilitrak came on right away. I drove it another 1/2 mile barely to exit and parked it. Towed it home, scanned it and only had P0300 (random misfire), and instantly compression tested it. All cylinders were great and over 160 psi but cylinder 3 was dead 0 psi.
At this point, I figured a broken valve spring. Took off valve cover but instead I found broken intake valve on the stem right by the retainer clip! Couldn’t believe it. Maybe it was caused by valve float? Or did timing jump? I can see where the piston hit valve but I got lucky and no sign of damage to piston visually. Valve was of course bent though.
Truck has 113,000 miles and has had Mobil 1 synthetic oil change every 4,000 miles. Truck has been pretty reliable in the last 6 years of ownership. Took the head off and it’s currently at machine shop getting all new valves, seals, and springs put on.
My question is what do you think caused this? Should I check the camshaft, timing chain,
replace oil pump, camshaft position sensor, actuator magnet, etc?? I’m a little strapped for cash so trying to make accurate repairs myself but don’t want to re-assemble just to have to break it down again. Any help or similar situation would be great!! Thank you all.
I have a 2007 Escalade AWD with the 6.2L. Recently while getting on it and accelerating on the freeway the engine straight up popped and had instant loss of power. Check engine light flashing and stabilitrak came on right away. I drove it another 1/2 mile barely to exit and parked it. Towed it home, scanned it and only had P0300 (random misfire), and instantly compression tested it. All cylinders were great and over 160 psi but cylinder 3 was dead 0 psi.
At this point, I figured a broken valve spring. Took off valve cover but instead I found broken intake valve on the stem right by the retainer clip! Couldn’t believe it. Maybe it was caused by valve float? Or did timing jump? I can see where the piston hit valve but I got lucky and no sign of damage to piston visually. Valve was of course bent though.
Truck has 113,000 miles and has had Mobil 1 synthetic oil change every 4,000 miles. Truck has been pretty reliable in the last 6 years of ownership. Took the head off and it’s currently at machine shop getting all new valves, seals, and springs put on.
My question is what do you think caused this? Should I check the camshaft, timing chain,
replace oil pump, camshaft position sensor, actuator magnet, etc?? I’m a little strapped for cash so trying to make accurate repairs myself but don’t want to re-assemble just to have to break it down again. Any help or similar situation would be great!! Thank you all.
