Engine Cooling: Notes

SYMPTOM TROUBLESHOOTING CHART - ENGINE COOLING

Symptom Troubleshooting Chart - Engine Cooling
Problem	Possible Cause	Action
Loss of Coolant	Radiator. Water pump seal. Radiator hoses. Heater hoses. Heater core. Engine gaskets. Coolant recovery reservoir bottle.	See COOLING SYSTEM PINPOINT TEST 1: LOSS OF COOLANT .
Engine Overheats	Thermostat. Water pump. Internal engine coolant leak. Radiator. Heater core. Inoperative cooling fan. Radiator cap.	See COOLING SYSTEM PINPOINT TEST 2: ENGINE OVERHEATS .
Engine Does Not Reach Normal Operating Temperature	Thermostat.	See COOLING SYSTEM PINPOINT TEST 3: ENGINE DOES NOT REACH NORMAL OPERATING TEMPERATURE .
Block Heater Does Not Operate Properly	Block heater cable. Block heater.	See COOLING SYSTEM PINPOINT TEST 4: BLOCK HEATER DOES NOT OPERATE PROPERLY .