Piston Ring, Engine

Piston Ring
Ring groove clearance
No. 1 0.17 to 0.22 mm (0.0067 to 0.0087 inch)
No. 2 0.17 to 0.21 mm (0.0067 to 0.0083 inch)
Oil ring 0.21 to 0.29 mm (0.0083 to 0.0114 inch)
Ring end gap
Standard
No. 1 0.22 to 0.32 mm (0.0087 to 0.0126 inch)
No. 2 0.50 to 0.60 mm (0.0197 to 0.0236 inch)
Oil ring 0.10 to 0.35 mm (0.0039 to 0.0138 inch)
Maximum
No. 1 0.89 mm (0.0350 inch)
No. 2 1.35 mm (0.0531 inch)
Oil ring 0.73 mm (0.0287 inch)