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 RING GAP

Ring gap-Top Compression Ring 0.20-0.36 mm (0.008-0.014 in.)
Ring gap-2nd Compression Ring 0.37-0.63 mm (0.0146-0.0249 in.)
Ring Gap-Oil Control (steel Rails) 0.25-0.76 mm (0.010-0.030 in.)

PISTON RING SIDE CLEARANCE

Compression Ring-Top 0.035-0.083 mm (0.0013-0.0032 in.)
Compression Ring-Second 0.040-0.080 mm (0.0016-0.0031 in.)
Oil Ring (Steel Rails) 0.058-0.204 mm (0.0022-0.0080 in.)