Inspect the socket, stem and face for excessive wear, cracks and other damage.
Pit marks on the tappet face are acceptable.
The following criteria defines the size of the pits allowed.
1. A single pit cannot be greater than 2 mm [0.078 in].
2. Interconnection of pits is not allowed.
3. Total pits when added together should not exceed 6 mm [0.236 in] diameter or a total of 4 percent of the
tappet face.
4. No pitting is allowable on the edges of the wear face of the tappet.
Measure the valve tappet stem.
