Knock Sensor: Service and Repair
KNOCK SENSOR ON-VEHICLE SERVICEREMOVE OR DISCONNECT
1. Negative battery cable.
2. Raise vehicle.
3. Remove front splash shield.
4. Drain cooling system.
5. Remove knock sensor heat shield mounting bolt located under freeze plug (or block heater if equipped), this step is for the rear knock sensor only.
6. Knock sensor wiring harness connector from knock sensor.
WARNING: Engine coolant may be hot. Although cooling system has been drained, coolant still remains in the engine water jacket. This coolant will drain when knock sensor is removed.
7. Knock sensor from engine block.
INSTALL OR CONNECT
NOTE: Do Not apply thread sealant to sensor threads. Sensor is coated at factory and applying additional sealant will affect the sensors ability to detect detonation.
1. Knock sensor into engine block.
^ Tighten knock sensor to 19 Nm (14 lb. ft).
2. Knock sensor heat shield mounting bolt located under freeze plug (or block heater if equipped), this step is for the rear knock sensor only.
3. Knock sensor wiring harness connector to the knock sensor.
4. Front splash shield.
5. Lower vehicle.
6. Fill cooling system.
7. Negative battery cable.