REMOVAL
3.7L
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 .
WARNING: Hot, pressurized coolant can cause injury by scalding. Cooling system must be partially drained before removing the coolant temperature sensor.
1. Partially drain the cooling system.
2. Disconnect the electrical connector from the sensor.
3. Remove the sensor from the intake manifold.
4.7L
WARNING: Hot, pressurized coolant can cause injury by scalding. Cooling system must be partially drained before removing the engine coolant temperature (ect) sensor.
The ECT sensor is located near the front of the intake manifold .
1. Partially drain cooling system. (Refer to 7 - COOLING - STANDARD PROCEDURE).
2. Disconnect electrical connector from ECT sensor.
3. Remove sensor from intake manifold.
5.7L
The Engine Coolant Temperature (ECT) sensor on the 5.7L engine is located under the air conditioning compressor . It is installed into a water jacket at the front of the cylinder block .
WARNING: Hot, pressurized coolant can cause injury by scalding. Cooling system must be partially drained before removing the coolant temperature sensor.
1. Partially drain the cooling system (Refer to 7 - COOLING - STANDARD PROCEDURE).
2. Remove accessory drive belt (Refer to 7 - COOLING/ACCESSORY DRIVE/DRIVE BELTS - REMOVAL).
3. Carefully unbolt air conditioning compressor from front of engine. Do not disconnect any A/C hoses from compressor. Temporarily support compressor to gain access to ECT sensor. Refer to Heating and Air Conditioning section for information.
4. Disconnect electrical connector from sensor.
5. Remove sensor from cylinder block.
3.0L DIESEL
WARNING: Risk of injury to skin and eyes from scalding with hot coolant. Risk of poisoning from swallowing coolant. Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly to release pressure. Store coolant in suitable and appropriately marked container. Wear protective gloves, clothes and eye wear.
1. Disconnect negative battery cable.
2. Remove engine cover (Refer to 9 - ENGINE - REMOVAL).
3. Partailly drain coolant system (Refer to 7 - COOLING/ENGINE/COOLANT - STANDARD PROCEDURE).
4. Unplug coolant temperature sensor electrical connector.
NOTE: Capture any residual coolant that may flow.
5. Remove coolant temperature sensor .