Piston Ring, Engine

Piston Ring End Gap
First Compression Ring 0.18-0.39 mm 0.007-0.015 in
Second Compression Ring 0.48-0.74 mm 0.019-0.029 in
Oil Control Ring 0.25-0.74 mm 0.010-0.029 in

Piston Ring to Groove Clearance
First Compression Ring 0.03-0.076 mm 0.001-0.003 in
Second Compression Ring 0.04-0.078 mm 0.002-0.003 in
Oil Control Ring 0.09 mm 0.004 in

Piston Ring Thickness
First Compression Ring 1.164-1.190 mm 0.046-0.047 in
Second Compression Ring 1.472-1.490 mm 0.058 in
Oil Control Ring - Maximum 2.440 mm 0.096 in