Mitsubishi S4Q2 User Manual

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Service Manual Mitsubishi SQ-Series diesel engines
Version 08/2004
ENGLISH
PISTONS, CONNECTING RODS,
CRANKSHAFT AND CRANKCASE ENGINE MAIN PARTS
7. Removing piston rings
Remove the piston rings with piston ring pliers
(31391–12900).
8. Removing piston pins
Using ring pliers, remove the snap rings.
Remove the piston pin to separate the piston from
the connecting rod.
If it is difficult to pull out the pin, heat the piston
with a piston heater or in hot water to expand the
pin bore.
9. Turning crankcase upside down
Turn the crankcase upside down with the oil pan
side up.
10. Measuring end play of crankshaft
1) With a dial indicator at the end of the
crankshaft, check the end play, as shown in
the illustration.
2) If the end play exceeds the service limit,
replace the thrust bearing.
Unit: mm [in.]
Figure 101 Removing piston rings
Piston ring pliers
Figure 102 Removing piston pins
Snap ring
pliers
Figure 103 Turning crankcase upside down
Figure 104 Measuring end play of crankshaft
Item
Assembly
Standard
Service
Limit
End play of crankshaft
0.10 to 0.20
[0.0039 to 0.0080]
0.30
[0.0118]

Mitsubishi S4Q2 Specifications

General

Brand	Mitsubishi
Model	S4Q2
Category	Engine
Language	English