Piston Ring, Engine

Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Production 0.31 - 0.52 mm (0.012 - 0.02 inch)
Piston Ring End Gap - First Compression Ring - Measured in Cylinder Bore - Service 0.31 - 0.59 mm (0.0122 - 0.023 inch)
Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore - Production 0.51 - 0.77 mm (0.02 - 0.03 inch)
Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore - Service 0.51 - 0.84 mm (0.02 - 0.033 inch)
Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore - Production 0.31 - 0.87 mm (0.0122 - 0.034 inch)
Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore - Service 0.31 - 0.94 mm (0.0122 - 0.037 inch)
Piston Ring to Groove Clearance - First Compression Ring - Production 0.04 - 0.08 mm (0.00157 - 0.0031 inch)
Piston Ring to Groove Clearance - First Compression Ring - Service 0.04 - 0.08 mm (0.00157 - 0.0031 inch)
Piston Ring to Groove Clearance - Second Compression Ring - Production 0.039 - 0.079 mm (0.0015 - 0.0031 inch)
Piston Ring to Groove Clearance - Second Compression Ring - Service 0.039 - 0.079 mm (0.0015 - 0.0031 inch)
Piston Ring to Groove Clearance - Oil Control Ring - Production 0.015 - 0.199 mm (0.0006 - 0.0078 inch)
Piston Ring to Groove Clearance - Oil Control Ring - Service 0.015 - 0.199 mm (0.0006 - 0.0078 inch)