Piston Ring, Engine
PISTON RINGPiston ring gap, standard
Top ring 0.20 - 0.35 mm (0.0079 - 0.0138 inch)
Second ring 0.35 - 0.50 mm (0.0138 - 0.0197 inch)
Oil ring rail 0.20 - 0.60 mm (0.0079 - 0.0236 inch)
Clearance between ring & ring groove
Top ring 0.040 - 0.080 mm (0.0016 - 0.0031 inch)
Second ring 0.030 - 0.070 mm (0.0012 - 0.0028 inch)
Clearance between oil ring & groove 0.045 - 0.125 mm (0.0018 - 0.0049 inch)