Piston Ring, Engine

Piston Ring Groove Clearance
No. 1 0.020 to 0.070 mm (0.0008 to 0.0028 inch)
No. 2 0.030 to 0.070 mm (0.0012 to 0.0028 inch)
Oil 0.020 to 0.065 mm (0.0008 to 0.0026 inch)
Ring End Gap
Standard
No. 1 0.22 to 0.32 mm (0.0087 to 0.0126 inch)
No. 2 0.60 to 0.70 mm (0.0236 to 0.0276 inch)
Oil 0.10 to 0.35 mm (0.0039 to 0.0138 inch)
Maximum
No. 1 0.50 mm (0.0197 inch)
No. 2 0.80 mm (0.0315 inch)
Oil 0.65 mm (0.0256 inch)