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)