Piston Ring

End Gap
* Nominal
Top Ring 0.25-0.51 mm (0.009843-0.020079 inch)
Second Ring 0.23-0.49 mm (0.009055-0.019291 inch)
Oil Ring Rail 0.15-0.66 mm (0.005906-0.025984 inch)
Maximum
Top Ring 1.00 mm (0.03937 inch)
Second Ring 1.00 mm (0.03937 inch)
Oil Ring Rail 1.15 mm (0.04528 inch)
Side Clearance, Minimum-Maximum
Top Ring 0.0090-0.0235 mm (0.000354-0.000925 inch)
Second Ring 0.030-0.080 mm (0.00118-0.003150 inch)
Oil Ring Snug Fit

* Specification in 90.200 mm (3.551174 inch) diameter gauge.