Piston Ring, Engine

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 0.06-0.025 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 - Maximum 2.50 mm 0.098 in