Examine piston for score marks, cracks, damaged ring grooves, loss of tin plating, or
indications of overheating. Using a crocus cloth, remove light score marks from piston.
Replace any piston severely scored or overheated. Discard piston if cracks are found
across internal struts.
(2) Piston Pin
Do not polish or refinish piston pin. Hand polishing will destroy precision finish
required against bushing and result in rapid bushing wear.
Inspect piston pin for signs of fretting. Discard pin if fretting is present.
Measure piston pin diameter. New pin must be 1.4996 to 1.5000 inches in diameter.
Replace used pin if diameter is 1.4980 inches or less.