Piston Ring, Engine

Oil Rails 0.025-0.65 mm (0.0098-0.0256 inch)

Oil Ring
Width 0.497-0.523 mm (0.019577-0.02060 inch)
Gap 0.399-1.40 mm (0.0157-0.0551 inch)

Compression Ring
Width (Both) 1.170-1.190 mm (0.0461-0.0469 inch)
Gap
Top 0.15-0.30 mm (0.006-0.012 inch)
2nd Ring 0.30-0.41 mm (0.0119-0.0161 inch)
Side Clearance in the Groove
Top Ring 0.040-0.080 mm (0.0016-0.0031 inch)
Second Ring 0.030-0.070 mm (0.0012-0.0028 inch)