TM 5-3805-248-23-1
ENGINE, EXHAUST AND COOLING SYSTEM TROUBLESHOOTING PROCEDURES - CONTINUED
0009 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
COOLING SYSTEM
23. Engine Overheats.
WARNING
Hot oil or metal parts can cause severe burns. Wear insulated gloves, long
sleeves and eye protection when working with heated parts. Failure to follow
this warning may cause injury.
1.
Check radiator for airflow
Remove obstructions from radiator.
obstructions.
2.
Inspect fan and fan belt condition.
1. If fan is found bent or defective, replace
fan (WP 0282 00).
2. Tighten fan belt. If fan belt is found
frayed or cut, replace fan belt(s) (WP
3. If fan belt(s) won't adjust properly,
3.
Test engine coolant temperature gage.
Refer to Electrical Troubleshooting (WP
4.
Inspect all hoses, fittings, water pump,
Repair any leaks or replace any damaged
and sending units.
parts.
5.
Check thermostat opening
1. Replace thermostat as needed (WP 0046
3. If problem still exists, replace water
pump.
4. If problem still exists, check cylinder
block, and cylinder head, for leaks or
breaks.
24. Engine Never Reaches
Normal Operating
Temperature.
WARNING
Hot oil or metal parts can cause severe burns. Wear insulated gloves, long
sleeves and eye protection when working with heated parts. Failure to follow
this warning may cause injury.
1.
Test engine coolant temperature gage
If vehicle gage indicates incorrect reading,
2.
1. Replace thermostat if required (WP