Piston Ring Gap and Groove Clearances

Piston Ring Side Clearance:
Standard Value:
No.1 0.04 - 0.085 mm (0.0016 - 0.0031 inch)
No.2 0.04 - 0.085 mm (0.0016 - 0.0031 inch)
Limit:
No.1 0.1 mm (0.004 inch)
No.2 0.1 mm (0.004 inch)
Piston Ring End Gap:
Standard:
No.1 0.15 - 0.30 mm (0.0059 - 0.0118 inch)
No.2 0.25 - 0.40 mm (0.008 - 0.014 inch)
Oil Ring Side Rail 0.20 - 0.70 mm (0.078 - 0.0275 inch)
Limit:
No.1 1 mm (0.039 inch)
No.2 1 mm (0.039 inch)
Oil Ring Side Rail 1 mm (0.039 inch)
Piston Ring Service Size And Mark:
Standard None
0.25 mm (0.010 inch) O.S. 25
0.50 mm (0.020 inch) O.S. 50
0.75 mm (0.030 inch) O.S. 75
1.00 mm (0.039 inch) O.S. 100