Mitsubishi S6R2 Series User Manual

6-17
Chapter 6 INSPECTION AND REPAIR OF BASIC ENGINE
4. Piston and Connecting Rod - Inspect and Repair
4.1 Piston - Inspect Visually
Check the combustion surface, piston pin bore, ring groove,
sliding surface and bottom surface of piston. If any defect
are found, replace the piston with a new one.
Piston - Inspect Visually
4.2 Piston Weight
Check the piston weight on the top face of piston.
When replacing pistons, be sure that the weight difference
per engine is within permissible range.
Piston Weight Stamp
4.3 Piston Outside Diameter - Measure
Measure the piston outside diameter of piston skirt at right
angle to piston pin. If the value exceeds the limit, replace
the piston with a new one.
Piston Outside Diameter - Measure
Item Part No. ID stamp
Compression
ratio
Standard
value
Piston
weight
difference
37517-30101
37517-10401
37517-00900
37517-25100
37517-05500
37517-05300
37517-07800
37517-07900
30101
10401
00900
25100
05500
05300
07800
07900
14
15
14.5
14
14
14
14
15
within 10 g
[0.35 oz]
37517-00800 00800 14
within 15 g
[0.53 oz]
CAM
ID mark
(Last 5 digits of PN)
Direction mark
Piston weight mark
Item Part No.
Nominal
value
Standard
value
Limit value
Piston
outside
diameter
37517-30101
37517-10401
37517-00900
37517-25100
37517-05500
37517-05300
ø170 mm
[6.69 in.]
169.760 to
169.800 mm
[6.6835 to
6.6850 in.]
169.660 mm
[6.6795 in.]
37517-07800
37517-07900
ø170 mm
[6.69 in.]
169.739 to
169.779 mm
[6.6826 to
6.6842 in.]
169.639 mm
[6.6787 in.]
37517-00800
ø170 mm
[6.69 in.]
169.760 to
169.780 mm
[6.6835 to
6.6842 in.]
169.660 mm
[6.6795 in.]
40 mm
[1.57 in.]
Measurement
point

Mitsubishi S6R2 Series Specifications

General

Brand	Mitsubishi
Model	S6R2 Series
Category	Engine
Language	English