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 logical successor to CHARM, I recommend you try it!

Link: lemon-manuals.la

Piston Ring


Ring Groove Clearance 0.030 - 0.070 mm

Standard End Gap
No.1 0.22 - 0.32 mm
No.2 0.50 - 0.60 mm
Oil (side rail) 0.10 - 0.35 mm

Maximum End Gap
No.1 0.89 mm
No.2 1.35 mm
Oil (side rail) 0.73 mm