Piston Ring, Engine

Piston ring
Ring groove clearance
Standard end gap
No. 1 0.22 to 0.32 mm (0.0087 to 0.0126 in.)
No. 2 0.50 to 0.60 mm (0.0197 to 0.0236 in.)

Oil (side rail) 0.10 to 0.35 mm (0.0039 to 0.0138 in.)

Maximum end gap
No. 1 0.89 mm (0.0350 in.)
No. 2 1.35 mm (0.0531 in.)
Oil (side rail) 0.73 mm (0.0287 in.)