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Page Title:
ENGINE WATER TEMPERATURE ABOVE NORMAL - continued |
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 TM 10-3930-673-20-1
14. ENGINE WATER TEMPERATURE ABOVE NORMAL (CONT).
6
KNOWN INFO
TEST OPTIONS
Indicated engine water
Visual inspection.
Is thermostat functioning?
temperature is continuously
REASON FOR QUESTION
above normal 180 to
If thermostat faulty, engine will
210 degrees F operating range.
overheat.
Engine coolant level OK.
Air flow across radiator adequate.
Fan drive belt OK.
Radiator cap OK.
Radiator hose(s) OK.
POSSIBLE PROBLEMS
Thermostat faulty.
Water pump faulty.
Cooling passages in cooling
system blocked.
Replace faulty
NO
thermostat (Para 7-3).
YES
7
KNOWN INFO
TEST OPTIONS
Indicated engine water
Visual inspection.
Is water pump functioning
temperature is continuously
REASON FOR QUESTION
properly?
above normal 180 to
If water pump faulty, engine will run
210 degrees F operating range.
hot.
Engine coolant level OK.
Air flow across radiator adequate.
Fan drive belt OK.
Radiator cap OK.
Radiator hose(s) OK.
Thermostat OK.
POSSIBLE PROBLEMS
Water pump faulty.
Cooling passages in cooling
system blocked.
Replace worn and/
NO
or faulty pump
(Para 7-5).
YES
2-688
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