Piston Ring, Engine

Piston ring
Piston ring gap
Top ring
STD Outer circle side: 0.20 - 0.25 mm (0.0079 - 0.0098 inch) Top ring Inner circle side: 0.20 - 0.30 mm (0.0079 - 0.0117 inch)
Limit 1.0 mm (0.039 inch)
Second ring
STD 0.40 - 0.50 mm (0.016 - 0.020 inch)
Limit 1.0 mm (0.039 inch)