Piston, Engine

Piston Rings
Piston Ring End Gap -. First Compression Ring - Measured in Cylinder Bore
Production 0.31-0.52 mm (0.012-0.02 inch)
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)
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)
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)
Piston Ring to Groove Clearance - 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)
Piston Ring to Groove Clearance - 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)
Pistons and Pins
Pin - Piston Pin Clearance to Piston Pin Bore
Production 0.002-0.01 mm (0.00008-0.0004 inch)
Service 0.002-0.015 mm (0.00008-0.0006 inch)
Pin - Piston Pin Diameter 23.952-23.955 mm (0.943-0.943 inch)
Pin - Piston Pin Fit in Connecting Rod Bore
Production 0.007-0.02 mm (0.00027-0.00078 inch)
Service 0.007-0.022 mm (0.00027-0.00086 inch)
Piston - Piston Diameter - Measured Over Coating - at Size Point 101.611-101.642 mm (4.0-4.001 inch)
Piston - Piston to Bore Clearance
Production 0.022 to 0.030 mm (0.0009 to 0.0012 inch)
Piston - Piston to Bore Clearance - With Skirt Coating Worn Off
Service 0.024-0.08 mm (0.00094-0.0031 inch)