Mitsubishi S4Q2 User Manual

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Service Manual Mitsubishi SQ-Series diesel engines
Version 08/2004
PISTONS, CONNECTING RODS,
CRANKSHAFT AND CRANKCASE
ENGLISH
ENGINE MAIN PARTS
Unit: mm [in.]
5. Checking clearance between connecting rod
bushing and piston pin
Measure the inside diameter of the connecting rod
bushing bore and the diameter of the piston pin, as
shown in the illustration, to check the clearance. If
the clearance exceeds the service limit, replace
the parts.
Unit: mm [in.]
6. Replacing connecting rod bushing
1) Use a connecting rod bushing puller to
replace the connecting rod bushings.
2) When installing a new bushing, align the oil
holes in the bushing and connecting rod.
Position the ends of the bushing at the
location shown in the illustration.
3) After installing the bushing, insert the piston
pin into position and make sure it rotates
smoothly.
Item
Nominal
Value
Assembly
Standard
Service
Limit
Diameter of
piston pin
28
[1.10]
27.994 to 28.0000
[1.1021 to 1.1024]
Clearance
between
piston pin
and bore
__
0.000 to 0.016
[0.0000 to 0.0006]
0.050
[0.0020]
Figure 113 Measuring connecting rod bushing
Measuring
directions
Measuring
points
Item
Nominal
Value
Assembly
Standard
Service
Limit
Inside
diameter of
bushing
28
[1.10]
28.020 to 28.045
[1.1031 to 1.1041]
Clearance
between
bushing and
piston pin
__
0.020 to 0.051
[0.0008 to 0.0020]
0.080
[0.0032]
Figure 114 Installing connecting rod bushing
Oil
holes
Weight mark side
End of bushing

Mitsubishi S4Q2 Specifications

General

Brand	Mitsubishi
Model	S4Q2
Category	Engine
Language	English