Piston Ring, Engine

PISTON RING GAP & GROOVE CLEARANCE

PISTON RING END GAP

First Compression Ring 0.15-0.30 mm (0.006-0.011 in)
Second Compression Ring 0.25-0.45 mm (0.009-0.017 in)
Oil Control Ring 0.15-0.65 mm (0.006-0.025 in)

PISTON RING TO GROOVE CLEARANCE

First Compression Ring 0.03-0.065 mm (0.001-0.002 in)
Second Compression Ring 0.02-0.055 mm (0.0007-0.002 in)
Oil Control Ring 0.01 mm (0.004 in)

PISTON RING THICKNESS

First Compression Ring 1.175-1.190 mm (0.046-0.047 in)
Second Compression Ring 1.475-1.490 mm (0.058 in)
Oil Control Ring 2.50 mm (0.098 in)