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 & GROOVE CLEARANCE

Ring Gap-Top Compression Ring 0.015-0.30 mm (0.0059-0.0118 in.)
Ring Gap-2nd Compression Ring 0.30-0.45 mm (0.0118-0.0177 in.)
Ring Gap-Oil Control Steel Rails 0.20-0.70 mm (0.0079-0.0276 in.)
Ring Side clearance-Compression Ring 0.03-0.07 mm (0.1182-0.0028 in.)
Ring Side clearance-Oil ring pack 0.06-0.15 mm (0.0024-0.0059 in.)