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

Ring Groove Width Compression Top 1.53 - 1.55 Millimeter (mm)
Ring Groove Width Compression Bottom 1.53 - 1.55 Millimeter (mm)
Ring Groove Width Oil 4.008 - 4.032 Millimeter (mm)
Ring Groove Width Compression To Ring Groove Clearance Top 0.04 - 0.08 Millimeter (mm)
Bottom 0.06 - 0.09 Millimeter (mm)
Piston Ring Width Compression Top 1.47 - 1.49 Millimeter (mm)
Ring Width Compression Bottom 1.46 - 1.49 Millimeter (mm)
Ring Width Oil Ring Service Limit Side Clearance 0.15 mm Max
Ring Gap Compression Bottom 0.25 - 0.28 Millimeter (mm)
Ring Gap Oil Ring Steel Rail 0.04 - 1.68 Millimeter (mm)