Piston Ring, Engine

Piston and Connecting Rod
Piston ring end gap - compression (top and bottom, in gauge) 0.25 - 0.50 mm (0.01 - 0.02 inch)
Piston ring end gap - oil ring (steel rail, in gauge) 0.25 - 1.25 mm (0.010 - 0.049 inch)
Piston ring groove width - compression (top and bottom) 1.530 - 1.555 mm (0.0602 - 0.0612 inch)
Piston ring groove width - oil 4.030 - 4.055 mm (0.1587 - 0.1596 inch)
Piston ring width - compression (top and bottom) 1.460 - 1.490 mm (0.0575 - 0.0587 inch)
Piston ring width - oil ring Side seal-snug fit
Piston ring width - Side clearance service limit 0.015 mm (0.0006 inch) maximum