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 0.009 - 0.020
Wear Limit 0.031
Ring Gap Second Compression Ring 0.019 - 0.031
Wear Limit 0.039
Ring Gap Oil Control Steel Rails 0.009 - 0.026
Wear Limit 0.039
Ring Clearance Compression Rings 0.0010 - 0.0026
Wear Limit 0.004
Ring Clearance Oil Control Ring 0.0002 - 0.0070
Ring Width Compression Rings 0.046 - 0.047
Ring Width Oil Control Rings 0.1124 - 0.1184