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

If the piston rings exceed 0.085 mm (0.0033 inch), replace the piston.
Ring to Groove Clearance Top Piston Ring (Standard Clearance) 0.035-0.065 mm (0.0014-0.0026 inch)
Second Piston Ring (Standard Clearance) 0.030-0.065 mm (0.0012-0.0026 inch)
Ring Gap Top and Second Ring 0.15-0.30 mm (0.006-0.012 in.)
Top and Second Ring (Maximum) 0.5 mm (0.020 in.)
Oil Rail 0.20-0.70 mm (0.008-0.028 in.)
Oil Rail (Maximum) 0.9 mm (0.035 in.)