Mitsubishi S4Q2 User Manual

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Service Manual Mitsubishi SQ-Series diesel engines
Version 08/2004
CAUSES OF ENGINE PROBLEMS AND
REMEDIES
ENGLISH
TROUBLESHOOTING
(• Refer to the separate troubleshooting chart.)
Engine vibrates excessively Engine stalls Poor response for deceleration Engine does not pick up speeds Engine operates at high speeds and does not stop Engine rotates in reverse direction Fuel consumption is high Oil consumption is high Fuel mixes with oil Water mixes with oil Excessive blowby
Abnormality in
lubrication
system
Abnormal
coolant
temperature
Alternator
defective
Remedies
Indicator does not light when engine is not operating Indicator lights when engine operates at low speed Indicator lights when engine operates at high speed Overheating Low Indicator does not light when engine is not operating Indicator lights when engine operates at high speed
__ ⊗ __ ⊗ __ __ ⊗⊗__ __ ⊗ __ __ __ ⊗ __ __ __ •
__ ⊗ __ __ __ __ ⊗⊗⊗__ ⊗ __ __ __ __ __ __ __
Repair or replace.
__ ⊗ __ __ __ __ ⊗⊗⊗__ ⊗ __ ⊗⊗__ __ __ __ Repair or replace.
__ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __
Check and replace bearings with
undersize ones if necessary.
__ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __
Tighten.
__ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __
Reinstall timing gears or adjust
valve sinkage.
⊗⊗__ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ Replace part(s).
⊗⊗__ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __
Adjust valve clearance to 0.25
mm [0.0098 in.].
__ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ Repair.
__ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __
Repair gear(s) or idler gear
bushing.

Mitsubishi S4Q2 Specifications

General

Brand	Mitsubishi
Model	S4Q2
Category	Engine
Language	English