Piston Ring, Engine

Piston Ring End Gap
First Compression Ring 0.15 - 0.36 mm (0.006 - 0.014 inch)
Second Compression Ring 0.48 - 0.74 mm (0.0188 - 0.0291 inch)
Oil Control Ring 0.25 - 0.77 mm (0.0098 - 0.0303 inch)

Piston Ring to Groove Clearance
First Compression Ring 0.04 - 0.086 mm (0.002 - 0.0033 inch)
Second Compression Ring 0.04 - 0.08 mm (0.002 - 0.0031 inch)
Oil Control Ring 0.07 - 0.095 mm (0.0028 - 0.0037 inch)

Piston Ring Thickness
First Compression Ring 1.164 - 1.190 mm (0.046 - 0.047 inch)
Second Compression Ring 1.460 - 1.490 mm (0.0574 - 0.0586 inch)
Oil Control Ring - Maximum 2.960 mm (0.116 inch)