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
1. Laying crankcase on its side
Carefully lay the crankcase on its side.
2. Checking thrust clearance of connecting rod big-
end
1) Check the clearance between the connecting
rod big-end and the crankpin with a feeler
gage, as shown in the illustration.
2) If the thrust clearance exceeds the service
limit, replace the connecting rod.
Unit: mm [in.]
3. Maximum permissible difference between average
weight of all connecting rod assemblies in one
engine
When replacing the connecting rods, select new
connecting rods having the same weight rank
marks so that the difference between average
weight of all connecting rod assemblies in one
engine does not exceeds the maximum
permissible limit.
Figure 95 Laying crankcase on its side
Figure 96 Checking thrust clearance of connecting
rod big-end
Item
Assembly
Standard
Service
Limit
Thrust clearance of
connecting rod big-end
(End play)
0.15 to 0.35
[0.0059 to 0.0138]
0.50
[0.0197]
Figure 97 Weight rank mark on connecting rod
Matching
marks
Weight rank
mark
Maximum permissible difference between
average weight of all connecting rod
assemblies in one engine
10 g
[0.35 oz]

Mitsubishi S4Q2 Specifications

General

Brand	Mitsubishi
Model	S4Q2
Category	Engine
Language	English