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. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
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 Fuel Injector Sight Shield Replacement in Engine Mechanical.



5. Remove the knock sensor heat shield mounting bolt that is located under the freeze plug, or located under the block heater if the vehicle is so equipped.
6. Disconnect the knock sensor wiring harness connector from the knock sensor.
7. Remove the knock sensor from the engine block.

Important: Do NOT apply a thread sealant to sensor threads. The sensor is coated at the factory. Applying additional sealant will affect the sensor's ability to detect a detonation.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

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.
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 Fuel Injector Sight Shield Replacement in Engine Mechanical.
7. Reconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.