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 Ring Gap Clearance Compression Ring 0.0090 to 0.0240 Inch (in)
2nd Compression Ring 0.0190 to 0.0380 Inch (in)
Oil Control Steel Rails 0.010 to 0.060 Inch (in)
Side Clearance Compression Rings 0.0017 to 0.0033 Inch (in)
Oil Control Rings 0.0024 to 0.0083 Inch (in)