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)

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Piston Ring, Engine


Piston Ring Groove Clearance 0.030-0.070 mm (0.0012-0.0028 in.)

Piston Ring End Gap
Standard End Gap
No. 1 0.25-0.35 mm (0.0098-0.0138 in.)
No. 2 0.35-0.45 mm (0.0138-0.0197 in.)
Oil (Side Rail) 0.15-0.40 mm (0.0059-0.0157 in.)

Maximum End Gap
No. 1 1.05 mm (0.0413 in.)
No. 2 1.20 mm (0.0472 in.)
Oil (Side Rail) 1.05 mm (0.0413 in.)