Engine Off

PROCEDURES
- Remove the valve cover.
- Check for damaged and severely worn parts and correct assembly.
- Make sure correct components are being used.

CAMSHAFT
- Check camshaft lobe lift.

PUSH RODS
- Check for bent push rods (6565) and restricted oil passage.

ROCKER ARM
- Check rocker arm assemblies for loose mounting bolts, studs, and nuts.
- Check for plugged oil feed in the rocker arm and cylinder head.
- Check for dislodged rocker arms.

VALVE SPRINGS
- Check for broken or damaged components.

VALVE SPRING RETAINER AND VALVE SPRING RETAINER KEYS
- Check for proper seating of the valve spring retainer keys on the valve stems and in the valve spring retainers.

VALVES AND CYLINDER HEAD
- When inspecting the cylinder head check the following:
a. Check the head gasket for proper installation.
b. Check for plugged oil drain back holes.
c. Check for worn or damaged valve tips.
d. Check for missing or damaged guide-mounted valve stem seal (6571).
e. Check collapsed valve tappet gap.
f. Check installed valve spring height.
g. Check for missing or worn valve spring seats (if equipped).