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

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Piston: Service and Repair


Pistons are supplied by three different manufacturers, Alcan-Nural, KS and Mahle. Both standard size and oversize pistons are available, however, pistons can be replaced only in sets of six. Numbers on connecting rod and bearing cap must be on same side when installing piston. Install piston with arrow facing toward front of engine.