Piston Ring, Engine

Piston Ring End Gap
First Compression Ring 0.18-0.39 mm (0.007-0.015 inch)
Second Compression Ring 0.48-0.74 mm (0.019-0.029 inch)
Oil Control Ring 0.25-0.74 mm (0.010-0.029 inch)
Piston Ring to Groove Clearance
First Compression Ring 0.03-0.076 mm (0.001-0.003 inch)
Second Compression Ring 0.04-0.078 mm (0.002-0.003 inch)
Oil Control Ring 0.09 mm (0.004 inch)
Piston Ring Thickness
First Compression Ring 1.164-1.190 mm (0.046-0.047 inch)
Second Compression Ring 1.472-1.490 mm (0.058 inch)
Oil Control Ring - Maximum 2.440 mm (0.096 inch)