Engine

Diameter of 480M piston skirt
(unit: mm)
Diameter of 480E
piston skirt (unit: mm)
Diameter of UAES’s
new two-valve piston
skirt (unit: mm)
1
79.91
-
79.92
79.915
-
79.925
79.915
-
79.925
2
79.92
-
79.93
79.925
-
79.935
79.925
-
79.935
3
79.93
-
79.94
79.935
-
79.94
79.935
-
79.94
Ex-factory
grouping
4
79.94
-
79.95
79.945
-
79.955
79.945
-
79.955
A
80.20
-
80.21
80.205
-
80.215
80.205
-
80.215
B
80.21
-
80.22
80.215
-
80.225
80.215
-
80.225
Ex-factory
repair
C 80.22-80.23 80.225-80.235 80.225-80.235
Standard
79.93
-
79.955
79.965
-
79.975
Oversized by 0.29 80.21-80.235 80.245-80.255
Spare
parts
Oversized by 0.5 80.43-80.455 80.465-80.475 80.435-80.455
Measure the diameter of piston pin bore
Diameter of 480M piston pin bore (unit: mm) Diameter of 480E piston pin bore (unit: mm)
White
20.630
-
20.633
White
20.630
-
20.633
Red
20.633
-
20.63
6
Red
20.633
-
20.636
Blue
20.636
-
20.639
Blue
20.636
-
20.639
Measure the diameter of the piston pin
Diameter of 480M piston pin bore (unit: mm) Diameter of 480E piston pin bore (unit: mm)
White 20.622-20.625 White 20.622-20.625
Red 20.625-20.628 Red 20.625-20.628
Blue 20.628-20.631 Blue 20.628-20.631
Measure the end clearance of the piston
ring
First compression ring: 0.30-0.50mm
Second compression ring: 0.30-0.50mm
Oil ring: 0.40-1.40mm
A-35
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