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: Service and Repair






NOTE: Before removing the pistons, mark their installation positions clearly on the piston crowns (as shown in illustration) using a waterproof felt-tipped pen.

CAUTION: Do NOT scratch or scribe the piston surface. This surface has a coating on it that must not be disturbed.





- Install piston using piston ring compressor.
- Arrow marking must point toward oil pump (front).