Valvetrain issues
- Worn or damaged camshaft lobes
- Bent pushrods
- Sticking or worn valve lifters
- Faulty valve springs or keepers
Piston ring problems
- Broken, cracked, or worn piston rings
- Piston ring gaps aligned (not offset)
- Carbon buildup on piston rings or piston ring grooves
Cylinder bore damage
- Scratches, gouges, or other damage on the cylinder walls
Blown head gasket:
- This can cause a loss of compression between cylinders.
Leaking valves:
- This can be caused by worn valve guides or valve seats, or carbon build-up on the valves.
Head gasket failure:
-A blown head gasket can cause compression to leak between the cylinders and the coolant system, resulting in a loss of compression in one or more cylinders.
