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

DIMENSION
Clearance Between The Piston Ring And Ring Groove
Standard Value
No. Ring 1 0.03-0.07 mm (0.0012-0.0028 inch)
No. Ring 2 0.02-0.06 mm (0.0008-0.0024 inch)
Limit 0.1 mm (0.004 inch)
End Gap
Standard Value:
No. 1 Ring 0.30-0.45 mm (0.0118-0.0177 inch)
No. 2 Ring 0.45-0.60 mm (0.0177-0.0236 inch)
Oil 0.20-0.60 mm (0.0079-0.0236 inch)
Limit:
No. 1 And No. 2 Ring 0.8 mm (0.031 inch)
Oil Ring 1.0 mm (0.039 inch)