Piston Ring, Engine

Piston Ring
Standard ring groove clearance
No. 1 ring 0.020 to 0.070 mm (0.0008 to 0.0028 inch)
No. 2 ring 0.020 to 0.060 mm (0.0008 to 0.0024 inch)
Oil ring 0.020 to 0.070 mm (0.0008 to 0.0028 inch)
Standard end gap (Measure the piston ring a little beyond the bottom of the ring travel, 110 mm (4.33 inch) from the top of the cylinder block.)
No. 1 ring 0.24 to 0.31 mm (0.0094 to 0.0122 inch)
No. 2 ring 0.33 to 0.43 mm (0.0130 to 0.0169 inch)
Oil ring 0.10 to 0.30 mm (0.0040 to 0.0118 inch)
Maximum end gap
No. 1 ring 0.89 mm (0.0350 inch)
No. 2 ring 1.37 mm (0.0539 inch)
Oil ring 0.73 mm (0.0287 inch)