Piston Ring, Engine

Piston ring
Ring groove clearance 0.030 to 0.070 mm (0.0012 to 0.0028 inch)
Standard ring groove clearance
No.1 Ring 0.20 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 (side rail) 0.020 to 0.070 mm (0.0008 to 0.0028 inch)
Standard end gap
No.1 0.24-0.31 mm (0.0094-0.0122 inch)
No.2 0.33-0.43 mm (0.0130-0.0169 inch)
Oil Ring 0.10-0.30 mm (0.0040-0.0119 inch)
Maximum end gap
No.1 0.89 mm (0.0350 inch)
No.2 0.33-0.43 mm (0.0130-0.0169 inch)
Oil Ring 0.10-0.30 mm (0.0040-0.0119 inch)