Knock Sensor: Service and Repair

REMOVAL PROCEDURE

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.

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.

Knock Sensor:

5. Remove the knock sensor heat shield mounting bolt located under the freeze 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.

INSTALLATION PROCEDURE

NOTE: Refer to Fastener Notice in Cautions and Notices.

IMPORTANT: Do Not apply thread sealant to sensor threads. The sensor is coated at factory and applying additional sealant will affect the sensors ability to detect detonation.

Knock Sensor:

1. Install the knock sensor into the engine block.

Tighten
Tighten the Knock sensor to 19 N.m (14 lb ft).

2. Install the knock sensor heat shield mounting bolt located under the freeze plug (or block heater 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.
7. Reconnect the negative battery cable.