Piston Ring, Engine

Piston Ring End Gap - Measured in Cylinder Bore
First Compression Ring
Production 0.31 - 0.52 mm (0.012 - 0.02 inch)
Service 0.31 - 0.59 mm (0.0122 - 0.023 inch)

Second Compression Ring
Production 0.51 - 0.77 mm (0.02 - 0.03 inch)
Service 0.51 - 0.84 mm (0.02 - 0.033 inch)

Oil Control Ring
Production 0.31 - 0.87 mm (0.0122 - 0.034 inch)
Service 0.31 - 0.94 mm (0.0122 - 0.037 inch)

Piston Ring to Groove Clearance
First Compression Ring
Production 0.035 - 0.08 mm (0.0014 - 0.0031 inch)
Service 0.035 - 0.08 mm (0.0014 - 0.0031 inch)

Second Compression Ring
Production 0.034 - 0.079 mm (0.0013 - 0.003 inch)
Service 0.034 - 0.079 mm (0.0013 - 0.003 inch)

Oil Control Ring
Production 0.012 - 0.2 mm (0.00047 - 0.00078 inch)
Service 0.012 - 0.2 mm (0.00047 - 0.00078 inch)