KNOWN INFO
TEST OPTIONS
Visual Inspection
REASON FOR QUESTION
KNOWN INFO
TEST OPTIONS
Visual Inspection
YES
NO
NO
YES
6.
5.
POSSIBLE PROBLEMS
POSSIBLE PROBLEMS
WARNING
Read WARNING
on following page.
d1. ENGINE OVERHEATS (CONT)
Coolant level OK.
Radiator core free of debris.
WATER TEMP gage OK.
Radiator OK.
Upper and lower coolant hoses
OK.
Radiator cap OK.
Radiator overflow tank and
hoses OK.
Cooling system pressure OK.
Radiator fan shroud OK.
Charge air cooler OK.
Coolant level OK.
Radiator core free of debris.
WATER TEMP gage OK.
Radiator OK.
Upper and lower coolant hoses
OK.
Radiator cap OK.
Radiator overflow tank and
hoses OK.
Cooling system pressure OK.
Radiator fan shroud OK.
Charge air cooler OK.
Water pump OK.
Tighten water pump
hardware or replace water
pump (para 6-12).
Faulty water pump.
Faulty thermostat.
Faulty fan clutch.
Is water pump secure and
free from damage?
If damage is present, water
pump is faulty.
Does thermostat operate
properly?
REASON FOR QUESTION
If thermostat does not operate
properly, thermostat is faulty.
Faulty thermostat.
Faulty fan clutch.
TM 9-2320-365-20-1
2-136 Change 1
Replace thermostat
(para 6-5).
