Liberty, Wrangler 2006-2007

Removal & Installation

Print

  1. Drain the cooling system.
  2.  
  3. Disconnect the sensor electrical connector.
  4.  
  5. Remove the Engine Coolant Temperature (ECT) sensor.

    Click image to see an enlarged view

    Fig. ECT sensor location on the 3.7L engines

  6.  

To install:

  1. Apply thread sealant to the sensor threads.
  2.  
  3. Install the ECT sensor into the engine block and tighten the mounting bolt to 8 ft. lbs. (11 Nm).
  4.  
  5. Connect the electrical connector.
  6.  
  7. Refill the cooling system to the correct level.
  8.  

2.4L Engine



  1. Partially drain the cooling system.
  2.  
  3. Disconnect the electrical connector from the sensor.
  4.  
  5. Remove the sensor from the intake manifold.
  6.  

To install:

  1. Apply thread sealant to sensor threads.
  2.  
  3. Install sensor to engine.
  4.  
  5. Tighten sensor to 8 ft. lbs. (11 Nm) torque.
  6.  
  7. Connect electrical connector to sensor.
  8.  
  9. Replace any lost engine coolant.
  10.  

2.8L Diesel Engine




WARNING
Do not remove or loosen the coolant pressure/vent cap, cylinder block drain plugs or the drain cock when the system is hot and under pressure because serious burns from the coolant can result.

  1. Disconnect negative battery cable.
  2.  
  3. Drain the cooling system.
  4.  
  5. Disconnect coolant temperature sensor electrical connector at thermostat housing .
  6.  
  7. Remove coolant temperature sensor from thermostat housing.
  8.  

To install:

  1. Install coolant temperature sensor in thermostat housing .
  2.  
  3. Connect coolant temperature sensor electrical connector.
  4.  
  5. Refill cooling system.
  6.  
  7. Connect negative battery cable.
  8.  

3.7L Engine




WARNING
Hot, pressurized coolant can cause injury by scalding. Cooling system must be partially drained before removing the coolant temperature sensor.

The Engine Coolant Temperature (ECT) sensor on the 3.7L engine is installed into a water jacket at front of intake manifold near rear of generator. The ECT sensor is located near the front of the intake manifold.

  1. Partially drain the cooling system.
  2.  
  3. Disconnect the electrical connector from the sensor.
  4.  
  5. Remove the sensor from the intake manifold.
  6.  

To install:

  1. Apply thread sealant to sensor threads.
  2.  
  3. Install sensor to engine.
  4.  
  5. Tighten sensor to 8 ft. lbs. (11 Nm) torque.
  6.  
  7. Connect electrical connector to sensor.
  8.  
  9. Replace any lost engine coolant.
  10.  

4.0L Engines




WARNING
Hot, pressurized coolant can cause injury by scalding. Cooling system must be partially drained before removing the coolant temperature sensor.



Click image to see an enlarged view

Fig. The coolant temperature sensor is installed in the thermostat housing

  1. Partially drain cooling system until coolant level is below cylinder head.
  2.  
  3. Disconnect coolant temperature sensor wire connector.
  4.  
  5. Remove sensor from thermostat housing.
  6.  

To install:

  1. Apply sealant to sensor threads (new replacement sensors will have sealant already applied).
  2.  
  3. Install coolant temperature sensor into thermostat housing. Tighten to 8 ft. lbs. (11Nm) torque.
  4.  
  5. Connect wire connector.
  6.  
  7. Fill cooling system.
  8.  

 
label.common.footer.alt.autozoneLogo