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 Compression (Top) 1.230-1.250
Compression (Bottom) 1.520-1.540
Oil Ring 3.030 - 3.055
Ring Side Clearance Compression (Top) 0.030 - 0.068 mm
Compression (Bottom) 0.030 - 0.068
Oil Ring Snug Fit