Piston Ring, Engine

Piston Rings
Ring end gap
Keystone 0.29-0.55 mm (0.011-0.021 inch)
Intermediate compression 1.40-1.66 mm(0.055-0.065 inch)
Oil control 0.24-0.50 mm (0.009-0.019 inch)
Ring groove width (measured over 2.08 mm [0.082 inch] gauge pins)
Upper limit 94.469 mm (3.719 inch)
Replacement limit 94.290 mm (3.712 inch)