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
Side clearance
No. 1
Specification 0.04 - 0.08 mm (0.0015 - 0.0031 in.)
Limit 0.1 mm (0.004 in.)
No. 2 0.03 - 0.07 mm (0.0012 - 0.0027 in.)
End gap
No. 1
Specification 0.23 - 0.38 mm (0.0090 - 0.0149 in.)
Limit 1 mm (0.039 in.)
No. 2
Specification 0.33 - 0.48 mm (0.0130 - 0.0189 in.)
Limit 1 mm (0.039in.)
Oil ring side rail
Specification 0.20 - 0.60 mm (0.0078 - 0.0236 in.)
Limit 1 mm (0.039 in.)
Service oversize 0.25, 0.50 mm (0.010, 0.020 in.)