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

End Gap Compression Ring, Groove 1 0.2-0.4 Millimeter (mm)
Wear Limit: 0.8 mm
Scraper Ring, Groove 2 0.2-0.4 Millimeter (mm)
Wear Limit: 1.0 mm
Oil Ring, Groove 3 0.3-0.6 Millimeter (mm)
Wear Limit: 2.0 mm
Groove Clearance Compression Ring, Groove 1 0.070-0.102 Millimeter (mm)
Wear Limit: 0.2 mm
Scraper Ring, Groove 2 0.040-0.072 Millimeter (mm)
Wear Limit: 0.2 mm
Oil Ring, Groove 3 0.020-0.052 Millimeter (mm)
Wear Limit: 0.1 mm