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Piston Ring Gap & Groove Clearance

Piston Compression Ring Gap
End Gap Measured in Cylinder Bore
Production-Top Groove 0.010 - 0.020 Inch (in)
Production-2nd Groove 0.018 - 0.026 Inch (in)
Service-Top Groove 0.010 - 0.025 Inch (in)
Service-2nd Groove 0.018 - 0.035 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) 0.010 - 0.030 Inch (in)
Gap (Service) 0.010 - 0.035 Inch (in)
Groove Clearance (Production) 0.002 - 0.006 Inch (in)
Groove Clearance (Service) 0.002 - 0.009 Inch (in)