Piston Ring, Engine

Piston ring end gap-compression (top, in gauge) 0.17-0.33 mm (0.0067-0.0130 in.)
Piston ring end gap-compression (bottom, in gauge) 0.3-0.55 mm (0.0 118-0.0217 in.)
Piston ring end gap - oil ring (steel rail, in gauge) 0.15-0.65 mm (0.0059-0.0256 in.)
Piston ring groove width - compression (top) 1.535-1.52 mm (0.0604-0.0598 in.)
Piston ring groove width - compression (bottom) 1.54-1.52 mm (0.0606-0.0598 in.)
Piston ring groove width - oil 3.05-3.03 mm (0.1200-0.1193 in.)
Piston ring width-compression (top) 1.47-1.49 mm (0.0578-0.0587 in.)
Piston ring width - compression (bottom) 1.47-1.49 mm (0.0578-0.0587 in.)
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 in.)
Piston ring-to-groove clearance - 2nd ring 0.030-0.070 mm (0.0012-0.0028 in.)