Montana SV6 (2006), Relay, Terraza, Uplander (2005-2007)

Removal & Installation

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CAUTION
Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system

3.5L Engine



  1. Engine coolant must be drained below the level of the Engine Coolant Temperature (ECT) sensor.
  2.  
  3. Remove the air intake duct.
  4.  
  5. Disconnect the ECT sensor harness connector.
  6.  
  7. Remove the ECT sensor.

    Click image to see an enlarged view

    Fig. Removing the coolant temperature sensor from the engine-3.5L engine

  8.  

To install:

  1. Tap out the sensor mounting hole to remove any thread sealant residue. If the old sensor is to be reused, clean the threads of all sealant residue.
  2.  
  3. Apply thread sealant to sensor threads.
  4.  
  5. Install the ECT sensor and tighten to 17 ft. lbs. (23 Nm).
  6.  
  7. Connect the ECT sensor harness connector. Push in the connector until a click is heard, then pull back to confirm a positive engagement.
  8.  
  9. Fill engine coolant to proper level.
  10.  
  11. Install the air intake duct.
  12.  
  13. Start the engine and check for leaks.
  14.  

3.9L Engine



  1. Engine coolant must be drained below the level of the Engine Coolant Temperature (ECT) sensor.
  2.  
  3. Remove the intake manifold cover.
  4.  
  5. Remove the exhaust crossover pipe.
  6.  
  7. Disconnect the ECT sensor harness connector.
  8.  
  9. Remove the ECT sensor.
  10.  

To install:

  1. Apply thread sealant to sensor threads.
  2.  
  3. Install the ECT sensor and tighten to 15 ft. lbs. (20 Nm).
  4.  
  5. Connect the ECT sensor electrical connector.
  6.  
  7. Install the exhaust crossover pipe.
  8.  
  9. Install the intake manifold cover.
  10.  
  11. Refill the cooling system to the correct level.
  12.  
  13. Start the engine and check for leaks.
  14.  

 
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