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
If it fails: lemon-manuals.org.ua

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Piston Ring, Engine

Piston Rings (End Gap Measured in Cylinder Bore) Piston Compression Ring Gap (Production-Top Groove) 0.098 - 0.015 Inch (in)
Piston Compression Ring Gap (Production-2nd Groove) 0.018 - 0.025 Inch (in)
Piston Compression Ring Gap (Service-Top Groove) 0.009 - 0.019 Inch (in)
Piston Compression Ring Gap (Service-2nd Groove) 0.018 - 0.031 Inch (in)
Piston Compression Ring Groove Clearance (Production-Top Groove) 0.0012 - 0.0027 Inch (in)
Piston Compression Ring Groove Clearance (Production-2nd Groove) 0.0015 - 0.003 Inch (in)
Piston Compression Ring Groove Clearance (Service Limit-Top Groove) 0.0012 - 0.0035 Inch (in)
Piston Compression Ring Groove Clearance (Service Limit-2nd Groove) 0.0015 - 0.0040 Inch (in)
Piston Oil Ring Gap (Production) 0.009 - 0.029 Inch (in)
Piston Oil Ring Gap (Service) 0.009 - 0.035 Inch (in)
Piston Oil Ring Groove Clearance (Production) 0.0018 - 0.0037 Inch (in)
Piston Oil Ring Groove Clearance (Service) 0.0018 - 0.0039 Inch (in)