Knock Sensor: Service and Repair

Knock Sensor Replacement

Removal Procedure




1. Drain the cooling system. Refer to Cooling System Draining and Filling (L26 Static Fill) (Service and Repair)Cooling System Draining and Filling (LS4 Static Fill) (Service and Repair)Cooling System Draining and Filling (L26 GE 47716 Fill) (Service and Repair)Cooling System Draining and Filling (LS4 GE 47716 Fill) (Service and Repair).
2. Disconnect the left knock sensor electrical connector, if required.




3. Remove the left knock sensor bolt, if required.
4. Remove the left knock sensor, if required.




5. Disconnect the right knock sensor electrical connector (2), if required.




6. Remove the right knock sensor bolt, if required.
7. Remove the right knock sensor, if required.

Installation Procedure




1. Position the right knock sensor to the engine block, if required.

Caution: Refer to Fastener Caution (Fastener Caution).

2. Install the right knock sensor bolt, if required.

Tighten the bolt to 20 Nm (15 lb ft).




3. Connect the right knock sensor electrical connector (2), if required.




4. Position the left knock sensor to the engine block, if required.
5. Install the left knock sensor bolt, if required.

Tighten the bolt to 20 Nm (15 lb ft).




6. Connect the left knock sensor electrical connector, if required.
7. Fill the cooling system. Refer to Cooling System Draining and Filling (L26 Static Fill) (Service and Repair)Cooling System Draining and Filling (LS4 Static Fill) (Service and Repair)Cooling System Draining and Filling (L26 GE 47716 Fill) (Service and Repair)Cooling System Draining and Filling (LS4 GE 47716 Fill) (Service and Repair).