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 Ring, Engine

Piston rings
Offset gaps by 120°
Use piston ring pliers for removal and installation
Mark TOP must face toward piston head





Checking piston ring gap
- Push ring squarely from above down to approximately 15 mm from bottom end of cylinder. To do this use a piston without rings.








Checking ring to groove clearance
- Clean ring groove of piston before checking.