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9-1
1. ENGINE SYSTEM
9 . TROUBLESHOOTING
Trouble symptom
Oil pressure caution lamp fails
to go out.
Radiator pressure valve spouts
steam.
Water temp gauge indicates
red range, on right.
Water temp gauge indicates
red range, on left.
Engine fails to start.
Engine emits whitish or bluish
smoke.
Engine emits blackish smoke.
Irregular fuel feeding sound
heard.
Abnormal sound heard.
(Fuel combustion or mechani-
cal sound)
Â
Poor quality of fuel.
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Overheating
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Muffler interior damaged.
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Excessively large valve clearance.
Â
Replace with specified fuel.
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See Symptom "Radiator pressure val-
ve spouts steam".
Â
Replace
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Adjust clearance.
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Fuel feed pump faulty.
Â
Replace pump.
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Air cleaner element clogged.
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Clean or replace element.
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Excessive quantity of oil in oil pan.
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Poor quality of fuel.
Â
Reduce oil quantity.
Â
Replace with specified fuel.
Â
Lack of fuel.
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Air mixed in fuel system.
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Fuel injection pump or nozzle defec-
tive.
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Starting motor rotates slowly.
Â
Engine compression insufficient.
Â
Valve clearance out of adjustment.
Â
Addfuel.
Â
Repair.
Â
Replace.
Â
See " Electrical system."
Â
Adjust clearance
Â
Thermostat faulty.
Â
Water temperature gauge faulty.
Â
Replace
Â
Replace
Â
Radiator fin clogged or fin damaged.
Â
Thermostat or water temp gauge fau-
lty.
Â
Radiator filler cap loosening.
Â
Clean or repair.
Â
Replace
Â
Retighten cap or replace packing.
Â
Lack of cooling water or water lea-
kage.
Â
Loosen fan belt.
Â
Dust and scale accumulated in, cool-
ing system.
Â
Add water or repair.
Â
Adjust belt.
Â
Change water and clean the interior
of cooling system.
Â
Low oil level in oil pan.
Â
Oil filter element clogged.
Â
Loose or worn oil pipe joint leaks oil.
Â
Add oil.
Â
Replace element.
Â
Check and repair.
P
P
robable cause
Remedy