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 1.503-1.505 mm
Intermediate 1.502-1.504 mm
Oil Control 3.030-3.050 mm
Piston Ring Gap
Top 0.13-0.28 mm
Intermediate 0.25-0.40 mm
Oil Control 0.15-0.65 mm