Piston Ring, Engine

Piston ring
Ring groove clearance 0.030 to 0.070 mm (0.0012 to 0.0028 inch)
Specified end gap
No.1 0.22 to 0.892 mm (0.0087 to 0.0350 inch)
No.2 0.50 to 1.35 mm (0.0197 to 0.0531 inch)
Oil (side rail) 0.10 to 0.73 mm (0.0039 to 0.0287 inch)