Piston Ring, Engine

Piston Ring
Piston ring groove clearance
No. 1 0.020 to 0.075 mm (0.0008 to 0.0030 inch)
No. 2 0.020 to 0.065 mm (0.0008 to 0.0026 inch)
Oil 0.020 to 0.070 mm (0.0008 to 0.0028 inch)
Piston ring end gap
STD No. 1 0.22 to 0.034 mm (0.0087 to 0.0134 inch)
No. 2 0.45 to 0.57 mm (0.0177 to 0.0224 inch)
Oil 0.10 to 0.40 mm (0.0039 to 0.0157 inch)