Piston Ring, Engine

Piston Ring
End gap
Top 0.15-0.30 mm (0.006-0.012 inch)
Intermediate 0.25-0.50 mm (0.0098-0.0197 inch)
Oil control 0.15-0.65 mm (0.0059-0.0256 inch)
Groove width
Top 1.52-1.55 mm (0.0598-0.0610 inch)
Intermediate 1.52-1.54 mm (0.0598-0.0606 inch)
Oil control 3.030-3.050 mm (0.1193-0.1201 inch)
Ring width - top and intermediate 1.50-1.47 mm (0.0590-0.0578 inch)
Ring-to-groove clearance
Top 0.020-0.080 mm (0.0008-0.0031 inch)
Intermediate 0.030-0.070 mm (0.0012-0.0028 inch)