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

DIMENSIONS
Piston Ring End Gap:
New:
1st Compression Ring 0.20-0.40 mm (0.0078-0.0157 inch).
2nd Compression Ring 0.20-0.40 mm (0.0078-0.0157 inch).
Oil Scraper Ring 0.25-0.50 mm (0.0098-0.0197 inch).
Wear Limit:
1st Compression Ring 1.00 mm (0.0390 inch).
2nd Compression Ring 1.00 mm (0.0390 inch).
Oil Scraper Ring 1.00 mm (0.0390 inch).
Ring To Groove Clearance:
New:
1st Compression Ring 0.02-0.05 (0.0008-0.0020 inch).
2nd Compression Ring 0.02-0.05 (0.0008-0.0020 inch).
Oil Scraper Ring 0.02-0.05 (0.0008-0.0020 inch).
Wear Limit:
1st Compression Ring 0.15 (0.0059 inch).
2nd Compression Ring 0.15 (0.0059 inch).
Oil Scraper Ring 0.15 (0.0059 inch).