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 mm (0.484-0.0492 inch)
Compression (Bottom) 1.520-1.540 mm (0.05984-0.06062 inch)
Oil Ring 3.030-3.055 mm