Piston Ring, Engine

Piston Rings
Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore
Production 0.23 0.44 mm (0.009 0.017 in)
Service 0.23 0.5 mm (0.009 0.0196 in)
Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore
Production 0.44 0.7 mm (0.017 0.027 in)
Service 0.44 0.76 mm (0.0173 0.03 in)
Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore
Production 0.18 0.75 mm (0.007 0.029 in)
Service 0.18 0.81 mm (0.007 0.032 in)
Piston Ring to Groove Clearance - First Compression Ring
Production 0.04 0.085 mm (0.00157 0.00335 in)
Service 0.04 0.085 mm (0.00157 0.00335 in)
Piston Ring to Groove Clearance - Second Compression Ring
Production 0.04 0.078 mm (0.00157 0.0031 in)
Service 0.04 0.078 mm (0.00157 0.0031 in)
Piston Ring to Groove Clearance - Oil Control Ring
Production 0.012 0.2 mm (0.0005 0.0078 in)
Service 0.012 0.2 mm (0.0005 0.0078 in)