Piston Ring, Engine

Piston ring groove clearance
No.1 0.020 - 0.070 mm (0.00008 - 0.0028 inch)
No.2 0.030 - 0.070 mm (0.0012 - 0.0028 inch)
Piston ring end gap
No.1 0.300 - 0.400 mm (0.0118 - 0.0157 inch)
No.2 0.400 - 0.500 mm (0.0157 - 0.0197 inch)