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

COMPRESSION RING
Top Groove Side Clearance 0.05-0.027 mm (0.0019-0.0027 inches)
Second Groove Side Clearance 0.05-0.027 mm (0.0019-0.0027 inches)
Top Ring Gap 0.25-0.50 mm (0.010-0.020 inches)
Second Ring Gap 0.25-0.50 mm (0.010-0.020 inches)

OIL RING
Groove Clearance 0.05-0.021 mm (0.0019-0.0082 inches)
Gap 0.25-0.50 mm (0 010-0.020 inches)