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)

Or, hide this message: temporarily or permanently

Piston Ring, Engine

Ring groove width
Top 1.500 - 1.505 mm
Intermediate 1.502 - 1.504 mm
Oil control 3.030 - 3.050 mm
Piston ring gap
Top 0.15 - 0.30 mm
Intermediate 0.25 - 0.50 mm
Oil control 0.15 - 0.65 mm