Piston Ring, Engine

Ring groove clearance 0.030 - 0.070 mm (0.0012 - 0.0028 inch)
End gap
Standard
No. 1 0.22 - 0.32 mm (0.0087 - 0.0126 inch)
No. 2 0.50 - 0.60 mm (0.0197 - 0.0236 inch)
Oil (side rail) 0.10 - 0.35 mm (0.0039 - 0.0138 inch)
Maximum
No. 1 0.89 mm (0.0350 inch)
No. 2 1.35 mm (0.0531 inch)
Oil (side rail) 0.73 mm (0.0287 inch)
Ring w/ head pin
Protrusion height 5.5 mm (0.2165 inch)