Piston Ring, Engine

Piston ring end gap-compression (top, in gauge) 0.17-0.33 mm (0.0067-0.013 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) 1.54-1.52 mm (0.0606-0.0598 inch)
Piston ring groove width-compression (bottom) 1.54-1.52 mm (0.0606-0.0598 inch)
Piston ring groove width-compression (oil) 3.05-3.03 mm (0.1200-0.1193 inch)
Piston ring width-compression (top and bottom) 1.460-1.490 mm (0.0575-0.0587 inch)
Piston ring width-compression (oil) Side seal-snug fit
Piston ring-to-groove clearance (1st and 2nd ring) 0.030-0.080 mm (0.0012-0.0032 inch)