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
Piston ring groove clearance
No. 1 0.020 to 0.075 mm (0.0008 to 0.0030 inch)
No. 2 0.020 to 0.065 mm (0.0008 to 0.0026 inch)
Oil 0.020 to 0.070 mm (0.0008 to 0.0028 inch)
Piston ring end gap
STD No. 1 0.22 to 0.034 mm (0.0087 to 0.0134 inch)
No. 2 0.45 to 0.57 mm (0.0177 to 0.0224 inch)
Oil 0.10 to 0.40 mm (0.0039 to 0.0157 inch)