Isuzu Ascender 2003-05

Removal & Installation

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If installing the original sensor or a new sensor without sealant, apply thread sealer P/N 12346004 or equivalent. Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.

4.2L Engine



  1. Disconnect the negative battery cable.
  2.  
  3. Drain coolant below the level of the Engine Coolant Temperature sensor.
  4.  
  5. Disconnect the ECT sensor electrical connector.
  6.  
  7. Carefully remove the ECT sensor.

    Click image to see an enlarged view

    Fig. ECT removal

  8.  

To install:

  1. Install the ECT sensor.
  2.  
  3. Tighten the ECT sensor to 12 ft. lbs. (16 Nm)
  4.  
  5. Connect the ECT electrical connector
  6.  
  7. Connect the negative battery terminal.
  8.  
  9. Refill the engine coolant.
  10.  
  11. Connect the negative battery cable.
  12.  

5.2L Engine



  1. Disconnect the negative battery cable.
  2.  
  3. Raise and suitably support the vehicle.
  4.  
  5. Drain the cooling system below the level of the sensor.
  6.  
  7. Disconnect the Engine Coolant Temperature sensor electrical connector.

    Click image to see an enlarged view

    Fig.

  8.  

To install:

  1. Coat the ECT sensor threads with sealer GM P/N 12346004, or equivalent.
  2.  
  3. Install the ECT sensor.
  4.  
  5. Tighten the sensor to 15 ft. lbs. (20 Nm).
  6.  
  7. Connect the ECT sensor electrical connector.
  8.  
  9. Refill the engine coolant.
  10.  
  11. Connect the negative battery cable.
  12.  

 
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