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: Testing and Inspection

PISTON
- Check each piston for scuffing, scoring wear, and other defects.
- Replace any piston that is defective.

PISTON PINS
- Check the piston pin fit in the piston pin hole.
- Replace any defective piston and pin assembly that is defective.
- The piston pin must be smoothly pressed by hand into the pin hole (at room temperature).