Knock Sensor: Service and Repair
KNOCK SENSOR REPLACEMENTREMOVAL PROCEDURE
Knock Sensor:
CAUTION: Hot engine coolant may cause severe burns. Although the cooling system has been drained, coolant still remains in the engine water jacket. This coolant will drain with the removal of the knock sensor.
1. Disconnect the negative battery cable.
2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in general information.
3. Remove the splash shield.
4. Drain the cooling system. Refer to Draining and Filling Cooling System (3800 V6 L36) in engine cooling.
Knock Sensor:
5. Remove the knock sensor heat shield mounting bolt located under the core hole plug (or block heater if equipped).
6. Disconnect the knock sensor wiring harness connector from the knock sensor.
7. Remove the knock sensor from the engine block.
Knock Sensor:
INSTALLATION PROCEDURE
IMPORTANT: Do Not apply thread sealant to sensor threads. The sensor is coated at factory and applying additional sealant will affect the sensor's ability to detect detonation.
NOTE: Refer to Fastener Notice in Service Precautions.
1. Install the knock sensor into the engine block.
Tighten
Knock sensor to 19 N.m (14 lb ft).
2. Install the knock sensor heat shield mounting bolt located under the core hole plug (or block healer if equipped).
3. Connect the knock sensor wiring harness connector to the knock sensor.
4. Install the splash shield.
5. Lower the vehicle.
6. Fill the cooling system. Refer to Draining and Filling Cooling System (3800 V6 L36) in engine cooling.
7. Reconnect the negative battery cable.