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 Clearance
No.1 0.020 - 0.070 mm
No.2 0.010 - 0.050 mm

Standard End Gap
No.1 0.250 - 0.450 mm
No.2 0.500 - 0.700 mm
Oil (side rail) 0.150 - 0.500 mm

Maximum End Gap
No.1 1.05 mm
No.2 1.30 mm
Oil (side rail) 1.10 mm