Piston Ring, Engine

Piston ring
Side clearance
No.1 0.04 - 0.08 mm (0.0015 - 0.0031 inch)
Limit 0.1 mm (0.004 inch)
No.2 0.03 - 0.07 mm (0.0012 - 0.0027 inch)
End gap
No.1 0.23 - 0.38 mm (0.0090 - 0.0149 inch)
Limit 1 mm (0.039 inch)
No.2 0.45 - 0.60 mm (0.0177 - 0.0236 inch)
Limit 1 mm (0.039 inch)
Oil ring side rail 0.20 - 0.60 mm (0.0078 - 0.0236 inch)
Limit 1 mm (0.039 inch)
Service oversize 0.25, 0.50 mm (0.010, 0.020 inch) oversize