- Clean the parts in solvent.
| • | Wear protective safety glasses and gloves. |
| • | Blow-dry the parts with compressed air. |
| • | Make sure the oil passages in the valve pushrods are clear. |
- Inspect the valve rocker arms and shafts at the mating surfaces,
in order to ensure that they are smooth and without scoring damage.
- Inspect the valve rocker arm areas which contact the valve stems
and the sockets which contact the valve pushrods. These areas should be smooth
and without damage or wear.
- Determine if the valve pushrods are bent by rolling the pushrod
on a flat surface.
- Replace the pushrod if the pushrod is bent.
- Inspect the ends of the valve pushrods for scoring or roughness.
- Inspect the valve lifter guide plates and clamps for damage.
- Replace any damaged parts.
Important: Some engines may have both standard and 0.010 inch oversize valve lifters.
The oversize lifter will have a 10 etched on the side. Stamped on the cast
pad next to the lifter bore and on the top rail of the cylinder case above
the lifter bore will be the letters OS.
- Inspect the valve lifter rollers for fatigue or pitting. Replace the
valve lifter as an assembly.
