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

Ring End Gap







Compression Ring End Gap:
1st ring
Standard 0.300 mm - 0.400 mm (0.0118 inch - 0.0157 inch)
Limit 1.0 mm (0.0394 inch)

2nd ring
Standard 0.450 mm - 0.600 mm (0.0177 inch - 0.0236 inch)
Limit 1.2 mm (0.0472 inch)

Oil Ring End Gap:
Standard 0.150 mm - 0.450 mm (0.0059 inch - 0.0177 inch)
Limit 1.05 mm (0.0413 inch)