TM 5-3810-300-24&P-3
15.2 Trouble Shooting (Engine)
SUGGESGTED REMEDY
1
Clean the cooling system with a good cooling
Check the flow of coolant through the . A clogged
system cleaner and thoroughly flush to remove scale
radiator will cause an inadequate supply of coolant on
deposits.
the suction side of the pump. Clean the radiator core.
Clean the exterior of the radiator core to open plugged
Remove the coolant filler cap and operate the engine,
passages and permit normal air flow.
checking for combustion gases in the cooling system.
Adjust fan belts to the proper tension to prevent slippage.
The cylinder head must be removed and inspected for
cracks and the head gaskets replaced if combustion
Check for an improper size radiator or inadequate
gases are entering the cooling system.
shrouding.
Check for an air leak on the suction side of the water
Repair or replace inoperative temperature-controlled fan
pump. Replace defective parts.
or inoperative shutters.
3
The thermostat may not be closing Remove,
2
Check the coolant level and fill to the filler neck if
inspect and test the thermostat Install a new thermostat,
the coolant level is low.
if necessary.
Inspect for collapsed or disintegrated hoses. Replace
Check for an improperly installed heater.
faulty hoses.
4
Excessive leakage of coolant past the thermostat
Thermostat may be inoperative. Remove. inspect and
seal is a cause of continued low coolant operating
test the thermostat; replace if found faulty Check the
temperature When this occurs, replace the thermostat
water pump for a loose or damaged impeller.
seal.
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