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: Specifications

Piston ring side clearance
No. 1 0.04 - 0.08 mm (0.0016 - 0.0031 in)
No. 2 0.03 - 0.07 mm (0.0012 - 0.0028 in)
Oil ring 0.06 - 0.15 mm (0.0024 - 0.0059 in)

Limit
No. 1 0.1 mm (0.004 in)
No. 2 0.1 mm (0.004 in)
Oil ring 0.2 mm (0.0079 in)

Piston ring end gap

Standard
No. 1 0.20 - 0.35 mm (0.0079 - 0.0138 in)
No. 2 0.37 - 0.52 mm (0.0146 - 0.0205 in)
Oil ring 0.20 - 0.60 mm (0.0079 - 0.0236 in)

Limit
No. 1, 2, oil ring 1.0 mm (0.039 in)