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 Gap Top Upper Compression Ring Standard 0.23 - 0.52 Millimeter (mm)
Limit 0.8 Millimeter (mm)
Piston Ring Gap Intermediate Compression Ring Standard 0.49 - 0.78 Millimeter (mm)
Limit 1.0 Millimeter (mm)
Piston Ring Gap Oil Control (Steel Ring) Ring Standard 0.23 - 0.66 Millimeter (mm)
Limit 1.0 Millimeter (mm)
Piston Ring Side Clearance Top Upper and Intermediate Compression Ring Standard 0.025 - 0.065 Millimeter (mm)
Limit 0.10 Millimeter (mm)
Piston Ring Side Clearance Oil Control (Pack) Ring 0.004 - 0.178 Millimeter (mm)
Piston Ring Width Top Upper and Intermediate Compression Ring 1.17 - 1.19 Millimeter (mm)
Piston Ring Width Oil Control (Pack) Ring 2.854 - 3.008 Millimeter (mm)