Piston Ring, Engine

Piston ring end gap-compression (top, in gauge) 0.17-0.33 mm (0.0067-0.0130 inch)
Piston ring end gap-compression (bottom, in gauge) 0.3-0.55 mm (0.0118-0.0217 inch)
Piston ring end gap-oil ring (steel rail, in gauge) 0.15-0.65 mm (0.0059-0.0256 inch)
Piston ring groove width-compression (top) 1.535-1.52 mm (0.0604-0.0598 inch)
Piston ring groove width-compression (bottom) 1.54-1.52 mm (0.0606-0.0598 inch)
Piston ring groove width-oil 3.05-3.03 mm (0.1200-0.1193 inch)
Piston ring width-compression (top) 1.47-1.49 mm (0.0578-0.0587 inch)
Piston ring width-compression (bottom) 1.47-1.49 mm (0.0578-0.0587 inch)
Piston ring width-oil ring side seal-snug fit
Piston ring-to-groove clearance-1st ring 0.030-0.065 mm (0.0012-0.0026 inch)
Piston ring-to-groove clearance-2nd ring 0.030-0.070 mm (0.0012-0.0028 inch)