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 Specifications

Ring Gap Top Compression Ring 0.008 - 0.014
2nd Compression Ring 0.0091 - 0.0197
Oil Control (Steel Rails) 0.010 - 0.030
Ring Side Clearance Top and Second Compression Ring 0.0016 - 0.0031
Oil Ring (Steel Rails) 0.0015 - 0.0073
Ring Width Top Compression Ring 0.0461 - 0.0469
2nd Compression Ring 0.058 - 0.059
Oil Ring (Steel Rings) 0.0176 - 0.0186