Piston Ring, Engine

Piston ring
Piston ring groove clearance
No.1 0.02 to 0.07 mm (0.0008 to 0.0028 inch)
No.2 0.02 to 0.06 mm (0.0008 to 0.0024 inch)
Oil 0.03 to 0.11 mm (0.0011 to 0.0043 inch)
Specified end gap
No.1 0.30 to 0.95 mm (0.0118 to 0.0031 inch)
No.2 0.50 to 1.00 mm (0.0012 to 0.0043 inch)
Oil (side rail) 0.15 to 1.00 mm (0.0012 to 0.0043 inch)