Piston: Specifications

PISTON AND PISTON PIN
Piston grade point H 37.3 mm (1.4685 inch)
Piston outer diameter
Standard
A 89.205 - 89.215 mm (3.5120 - 3.5124 inch)
B 89.195 - 89.205 mm (3.5116 - 3.5120 inch)
0.25 mm (0.0098 inch) oversize 89.445 - 89.465 mm (3.5215 - 3.5222 inch)
0.50 mm (0.0197 inch) oversize 89.695 - 89.715 mm (3.5313 - 3.5321 inch)
Cylinder to piston clearance, standard -0.010 - 0.010 mm (-0.0004 - 0.0004 inch)
Clearance between pin & pin hole, standard 0.004 - 0.008 mm (0.0002 - 0.0003 inch)

PISTON RING
Piston 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)