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. Turn OFF the ignition.
2. Drain the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
3. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
4. Disconnect the electrical connector (2) from the knock sensor (1).



5. Remove the knock sensor (2) from the engine block (1).

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.

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

1. Install the knock sensor (2) into the engine block (1).

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




2. Connect the electrical connector (2) to the knock sensor (1).
3. Lower the vehicle.
4. Fill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
5. Start the engine.
6. Check the coolant level.