Piston Ring, Engine
Piston ringPiston ring gap
Top ring
STD 0.20-0.35 mm (0.0079-0.0138 inch)
Limit 1.0 mm (0.039 inch)
Second ring
STD 0.37-0.52 mm (0.0146-0.0205 inch)
Limit 1.0 mm (0.039 inch)
Oil ring
STD 0.20-0.50 mm (0.0079-0.0197 inch)
Limit 1.5 mm (0.059 inch)
Clearance between piston ring and piston ring groove
Top ring
STD 0.040-0.080 mm (0.0016-0.0031 inch)
Limit 0.15 mm (0.0059 inch)
Second ring
STD 0.030-0.070 mm (0.0012-0.0028 inch)
Limit 0.15 mm (0.0059 inch)