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 in)
Service 0.31-0.59 mm (0.0122-0.023 in)
Piston Ring End Gap - Second Compression Ring - Measured in Cylinder Bore
Production 0.51-0.77 mm (0.02-0.03 in)
Service 0.51-0.84 mm (0.02-0.033 in)
Piston Ring End Gap - Oil Control Ring - Measured in Cylinder Bore
Production 0.31-0.87 mm (0.0122-0.034 in)
Service 0.31-0.94 mm (0.0122-0.037 in)
Piston Ring to Groove Clearance - First Compression Ring
Production 0.04-0.08 mm (0.00157-0.0031 in)
Service 0.04-0.08 mm (0.00157-0.0031 in)
Piston Ring to Groove Clearance - Second Compression Ring
Production 0.039-0.079 mm (0.0015-0.0031 in)
Service 0.039-0.079 mm (0.0015-0.0031 in)
Piston Ring to Groove Clearance - Oil Control Ring
Production 0.015-0.199 mm (0.0006-0.0078 in)
Service 0.015-0.199 mm (0.0006-0.0078 in)
Piston and Pins
Pin - Piston Pin Clearance to Piston Pin Bore
Production 0.002-0.01 mm (0.00008-0.0004 in)
Service 0.002-0.015 mm (0.00008-0.0006 in)
Pin - Piston Pin Diameter 23.952-23.955 mm (0.943-0.943 in)
Pin - Piston Pin Fit in Connecting Rod Bore
Production 0.007-0.02 mm (0.00027-0.00078 in)
Service 0.007-0.022 mm 0.00027-0.00086 in
Piston - Piston Diameter - Measured Over Skirt Coating 101.606-101.640 mm (4.0002-4.0016 in)
Piston - Piston to Bore Clearance
Production 0.022-0.03 mm - interference (0.0009-0.0012 in - interference)
Service Limit with Skirt Coating Worn Off 0.07 mm (0.0028 in)