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 Compression Ring Gap (Production-Top Groove) 0.098 - 0.015 Inch (in)
(Production-2nd Groove) 0.0014 - 0.0022 Inch (in)
(Service-Top Groove) 0.009 - 0.019 Inch (in)
(Service-2nd Groove) 0.0014 - 0.0022 Inch (in)
Piston Compression Ring Groove Clearance (Production-Top Groove) 0.0012 - 0.0027 Inch (in)
(Production-2nd Groove) 0.0015 - 0.003 Inch (in)
(Service Limit-Top Groove) 0.0012 - 0.0035 Inch (in)
(Service Limit-2nd Groove) 0.0015 - 0.0040 Inch (in)
Piston Oil Ring Gap (Production) 0.009 - 0.029 Inch (in)
(Service) 0.009 - 0.035 Inch (in)
Piston Oil Ring Groove Clearance (Production) 0.0018 - 0.0077 Inch (in)
(Service) 0.0018 - 0.0078 Inch (in)