Pontiac Torrent Engine Overheating

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ENGINE OVERHEATING
 DEFINITION: The engine temperature lamp comes on and stays on: the temperature gauge shows hot or coolant overflows from the coolant recovery reservoir onto the ground while the engine is running.
Step Action Value(s) Yes No
1


Check for a loss of coolant. Has there been a loss of coolant?



Go to Step 2


Go to Step 3


2


Refer to Loss of Coolant.
Does the engine still overheat?



Go to Step 3


System OK


3

 

Check for a loss of system pressure. Use the J 24460-01 Cooling System Pressure Tester. See Special Tools.
Has there been a loss of system pressure?


Go to Step 4


Go to Step 5


4



Correct the system pressure.
Does the engine still overheat?


Go to Step 5


System OK


5

 

  1. Check for low coolant protection.
  2. Make sure that the solution is at the specified temperature.
    Is there low coolant protection?


-37 C (-34°F)


Go to Step 6


Go to Step 7


6


Correct as necessary. Does the engine still overheat?



Go to Step 7


System OK


7




  1. Check the accessory drive belt tension.
  2. Check the tensioner. Refer to Drive Belt Tensioner Diagnosis in Engine Mechanical – 3.4 L.
    Is thetensioner working properly and the tension correct?



Go to Step 9


Go to Step 8


8



Replace the tensioner. Refer to Drive Belt Tensioner Diagnosis in Engine Mechanical – 3.4 L.
Does the engine still overheat?



Go to Step 9


System OK


9



Check to see if the timing is retarded by a malfunctioning powertrain control module (PCM).
Is the timing retarded by a malfunctioning PCM?



Go to Step 10


Go to Step 11


10


Correct as necessary. Does the engine still overheat?



Go to Step 11


System OK


11


Check to see if any of the radiator fins are obstructed.
Are any of radiator fins obstructed?



Go to Step 12


Go to Step 13


12




  1. Remove or relocate any add-on parts that block air to the radiator.
  2. Remove any debris from the radiator fins.

Does the engine still overheat?



Go to Step 13


System OK


13



Check to see if any of the cooling system passages are blocked by rust or scale.
Are any of the cooling system passages blocked by rust or scale?



Go to Step 14


Go to Step 15


14

 

 

 

  1. Drain the cooling system. Refer to Draining and Filling Cooling System (Static Fill) or Draining and
    Filling Cooling System (GE 47716 Fill).
  2. Flush the cooling system. Refer to Coolant System Flushing.
  3. Repair as necessary.

Does the engine still overheat?



Go to Step 15


System OK


15


Check for a pinched or kinked coolant recovery reservoir hose.
Is the surge tank hose pinched orkinked?



Go to Step 16


Go to Step 17


16


Replace or reroute the hose as necessary. Refer to Surge Tank Hose/Pipe Replacement – Inlet.
Does the engine still overheat?



Go to Step 17


System OK


17


Check for an inoperative cooling fan. Refer to Cooling Fan Inoperative in Engine Cooling.
Are there any inoperative cooling fans?



Go to Step 18


Go to Step 19


18


Repair or replace the electric cooling fans as necessary. Refer to Cooling Fan Motor Replacement – Electric.
Does the engine still overheat?



Go to Step 19


System OK


19 Check for a loose, damaged, and/or missing deflector.
Are there any loose, damaged, or missingdeflectors?



Go to Step 20


Go to Step 21


20


Replace the deflectors. Does the engine still overheat?



Go to Step 21


System OK


21


Check to see if the thermostat is stuck in the closed position.
Is the thermostat stuck in the closedposition?



Go to Step 22


Go to Step 23


22


Replace the thermostat. Refer to Thermostat Replacement.
Does the engine still overheat?



Go to Step 23


System OK


23


Check for a faulty coolant pump.
Is the coolant pump faulty?



Go to Step 24


Go to Step 25


24


Replace the water pump. Refer to Water Pump Replacement.
Does the engine still overheat?



Go to Step 25


System OK


25


Check for an incorrect radiator.
Is the radiator correct?



Go to Step 26


26


Install the correct radiator. Refer to Radiator Replacement.
Does the engine still overheat?


_ System OK

Pontiac Torrent Engine Overheating

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