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)

Or, hide this message: temporarily or permanently

Piston Ring, Engine

PISTON RINGS
Ring Gap-Top Compression Ring 0.20 - 0.36 mm (0.008 - 0.014 inch)
Ring Gap-2nd Compression Ring 0.37 - 0.63 mm (0.0146 - 0.0249 inch)
Ring Gap-Oil Control (Steel Rails) 0.25 - 0.76 mm (0.010 - 0.030 inch)

PISTON RING SIDE CLEARANCE
Compression Ring-Top 0.035 - 0.083 mm (0.0013 - 0.0032 inch)
Compression Ring-Second 0.040 - 0.080 mm (0.0016 - 0.0031 inch)
Oil-Ring 0.058 - 0.204 mm (0.0022 - 0.0080 inch)
Oil Ring (Steel Rails) 0.058 - 0.204 mm (0.0022 - 0.0080 inch)

PISTON RING WIDTH
Compression Rings-Top and Second 1.47 - 1.49 mm (0.0579 - 0.0587 inch)
Oil Ring (Steel Rails 0.445 - 0.470 mm (0.0176 - 0.0186 inch)