Piston Ring, Engine

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)
End Gap
Standard
No. 1 0.22 to 0.34 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)
Maximum
No. 1 0.90 mm (0.0354 inch)
No. 2 1.36 mm (0.0535 inch)
Oil 0.75 mm (0.0295 inch)