Compression test shows cylinder 4 at 80psi while the other three are at 145. Thank you GM.
Just a off the wall guess but I remember when my cruze was having the stabillalink issue it was due to the coolant temp sensors and was a safety mechanism in the car because of it. I believe there are 2, 1 right below the water outlet on the engine itself, and another on the intercooler frontpassenger side. I believe they were pretty cheap and it fixed all my problems. Hope it helps, dealing with a stuttering when above 3500 rpms due to a bad fuel injector I believe. Already replaced the intake manifold/3 valve covers/ThrottleBody/WaterOutlet/coolant sensors.There is no oil consumption as far as I can tell. Because this happened in conjunction with a PCV blow-up where oil was hitting the intake in significant quantity, could it be a leaky exhaust valve?
If failed piston, are all four replaced to ensure equal compression?
It's going back in tomorrow and I sure hope I don't get a runaround on the warranty. I'm wondering if this is an indicator of future major engine problems. If this happened a few months later, I'd be out a big chunk of change for something that really shouldn't be happening to a 60k engine.
OP this thread is 5 years old 😃. diagnosis was a cracked piston ringJust a off the wall guess but I remember when my cruze was having the stabillalink issue it was due to the coolant temp sensors and was a safety mechanism in the car because of it. I believe there are 2, 1 right below the water outlet on the engine itself, and another on the intercooler frontpassenger side. I believe they were pretty cheap and it fixed all my problems. Hope it helps, dealing with a stuttering when above 3500 rpms due to a bad fuel injector I believe. Already replaced the intake manifold/3 valve covers/ThrottleBody/WaterOutlet/coolant sensors.