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
Piston ring groove clearance
No. 1 0.02 to 0.07 mm (0.0008 to 0.0028 in.)
No. 2 0.02 to 0.06 mm (0.0008 to 0.0024 in.)
Oil 0.07 to 0.15 mm (0.0028 to 0.0060 in.)
Piston ring end gap
Standard
No. 1 0.30 to 0.40 mm (0.0118 to 0.0157 in.)
No. 2 0.40 to 0.50 mm (0.0157 to 0.0197 in.)
Oil (Side rail) 0.10 to 0.40 mm (0.0039 to 0.0157 in.)
Maximum
No. 1 1.0 mm (0.039 in.)
No. 2 1.1 mm (0.043 in.)
Oil (Side rail) 1.0 mm (0.039 in.)