Piston Ring, Engine

Piston Ring
Groove Clearance
No. 1 0.020 to 0.070 mm (0.0008 to 0.0028 inch)
No. 2 0.020 to 0.060 mm (0.0008 to 0.0024 inch)
Oil 0.020 to 0.070 mm (0.0008 to 0.0028 inch)
End Gap
Standard
No. 1 0.23 to 0.33 mm (0.0091 to 0.0130 inch)
No. 2 0.35 to 0.45 mm (0.0138 to 0.0177 inch)
Oil 0.10 to 0.40 mm (0.0039 to 0.0157 inch)
Maximum
No. 1 0.40 mm (0.0157 inch)
No. 2 0.50 mm (0.0197 inch)
Oil 0.45 mm (0.0177 inch)