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

END GAP [1]
Top 0.20-0.25 mm (0.008-0.010 inch)
Second 0.30-0.50 mm (0.012-0.020 inch)
Oil 0.40-1.40 mm (0.016-0.055 inch)

SIDE CLEARANCE
Nominal
Compression
Top 0.04-0.075 mm (0.0016-0.0030 inch)
Second 0.02-0.052 mm (0.0016-0.0033 inch)
Oil Snug Fit
Limit (Maximum)
Compression 0.10 mm (0.004 inch)

[1] Specification 82.4 mm diameter gauge.