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Knock Sensor: Service and Repair



Knock Sensor Replacement

Removal Procedure




1. Drain the cooling system. Refer to Draining and Filling Cooling System (9C1, 9C3 Static Fill) Draining and Filling Cooling System (LS4 GE 47716 Fill) Draining and Filling Cooling System (LS4 Static Fill) Draining and Filling Cooling System (LZE, LZ4, LZ8, 9C1, 9C3, GE47716 Fill) Draining and Filling Cooling System (LZE, LZ4, LZ8 Static Fill).
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.

Notice: Refer to Fastener Notice.

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

Tighten the bolt to 20 N.m (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 N.m (15 lb ft).




6. Connect the left knock sensor electrical connector, if required.
7. Fill the cooling system. Refer to Draining and Filling Cooling System (9C1, 9C3 Static Fill) Draining and Filling Cooling System (LS4 GE 47716 Fill) Draining and Filling Cooling System (LS4 Static Fill) Draining and Filling Cooling System (LZE, LZ4, LZ8, 9C1, 9C3, GE47716 Fill) Draining and Filling Cooling System (LZE, LZ4, LZ8 Static Fill).