Piston Ring: Specifications

Piston ring end gap-compression (top, gauge diameter) 0.100 - 0.250 mm (0.0039 - 0.0098 inch)
Piston ring end gap-compression (bottom, gauge diameter) 0.27 - 0.42 mm (0.0106 - 0.0165 inch)
Piston ring end gap-oil ring (steel rail, gauge diameter) 0.15 - 0.65 mm (0.0059 - 0.0255 inch)
Piston ring end gap-compression (top, service limit) 0.50 mm (0.0196 inch) maximum
Piston ring end gap-compression (bottom. service limit) 0.65 mm (0.0255 inch) maximum
Piston ring end gap-oil ring (steel rail, service limit) 0.90 mm (0.0:354 inch) maximum
Piston ring groove width-compression (top) 1.230 - 1.245 mm (0.0484 - 0.0190 inch)
Piston ring groove width-compression (bottom) 1.530 - 1.545 mm (0.0602 - 0.0608 inch)
Piston ring groove width 3.030 - 3.055 mm (0.1192 - 0.0120 inch