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
Ring groove clearance 0.030 to 0.070 mm (0.0012 to 0.0028 inch)
Specified end gap
No.1 0.22 to 0.892 mm (0.0087 to 0.0350 inch)
No.2 0.50 to 1.35 mm (0.0197 to 0.0531 inch)
Oil (side rail) 0.10 to 0.73 mm (0.0039 to 0.0287 inch)