Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Piston Pin: Testing and Inspection

Wrist Pin

NOTE: Wrist pins are only supplied as an assembly with replacement pistons.

1. Check wrist pins for signs of wear and overheating.
2. Check clearance of wrist pin in piston.
Wrist pin to piston clearance: 0.006 to 0.015 mm.
3. Check overall dimensions of wrist pin.
Overall length: 60.00 to 60.50 mm.
Diameter-measured at each end and center of pin: 23.995 to 24.00 mm.