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

Piston Ring Groove Clearance No.1 0.030-0.070 mm
No.2 0.030-0.070 mm
Piston Ring Eng Gap (Standard) No.1 0.270-0.470 mm
No.2 0.450-0.650 mm
Oil (Side Rail) 0.100-0.450 mm
Piston Ring End Cap (Maximum) No.1 1.07 mm
No.2 1.25 mm
Oil (Side Rail) 1.05 mm