Piston, Engine

Piston Rings
Piston Ring End Gap - First Compression Ring - Production 0.25-0.40 mm (0.010-0.016 in)
Piston Ring End Gap - Second Compression Ring - Production 0.38-0.58 mm (0.015-0.023 in)
Piston Ring End Gap - Oil Control Ring - Production 0.25-0.76 mm (0.010-0.029 in)
Piston Ring End Gap - First Compression Ring - Service 0.25-0.50 mm (0.010-0.020 in)
Piston Ring End Gap - Second Compression Ring - Service 0.38-0.80 mm (0.015-0.031 in)
Piston Ring End Gap - Oil Control Ring - Service 0.005-0.090 mm (0.0002-0.0035 in)
Piston Ring to Groove Clearance - First Compression Ring - Production 0.030-0.070 mm (0.0012-0.0027 in)
Piston Ring to Groove Clearance - Second Compression Ring - Production 0.076-0.280 mm (0.0030-0.0110 in)
Piston Ring to Groove Clearance - Oil Control Ring - Production 0.046-0.196 mm (0.0018-0.0077 in)
Piston Ring to Groove Clearance - First Compression Ring - Service 0.030-0.085 mm (0.0012-0.0033 in)
Piston Ring to Groove Clearance - Second Compression Ring - Service 0.030-0.085 mm (0.0012-0.0033 in)
Piston Ring to Groove Clearance - Oil Control Ring - Service 0.076-0.200 mm (0.0030-0.0079 in)
Pistons and Pins
Piston - Piston to Bore Clearance - Production 0.018-0.061 mm (0.0007-0.0024 in)
Piston - Piston to Bore Clearance - Service 0.075 mm (0.0029 in)
Pin - Piston Pin Clearance to Connecting Rod Bore - Press Fit 0.012-0.048 mm (0.0005-0.0019 in)
Pin - Piston Pin Clearance to Piston Pin Bore - Production 0.013-0.023 mm (0.0005-0.0009 in)
Pin - Piston Pin Clearance to Piston Pin Bore - Service 0.025 mm (0.0010 in)
Pin - Piston Pin Diameter 23.545-23.548 mm (0.9270-0.9271 in)