Knock Sensor: Service and Repair

Removing And Installing Knock Sensor - Engine Removed

Removing And Installing Knock Sensor, Cylinder Bank 1-3

Removal







1. Disconnect plug -lower arrow- of the knock sensor and set it aside. Unscrew M8 hexagon-head bolt -upper arrow- and remove the knock sensor.

Installation
2. Clean contact surface for the sensor on the engine block.

NOTE: In order to guarantee the proper function of the knock sensor, always use the correct tightening torque.







3. In order to guarantee the.proper function of the knock sensor, screw in the M8 hexagon-head bolt -upper arrow- and tighten with the correct tightening torque, then connect the plug again.

Tightening torque: 23 Nm (17 ftlb.)

Removing Knock Sensor, Cylinder Bank 4 - 6
1. Remove the oil container.







2. Undo the crankcase ventilation tube. Unscrew the union nut -arrow- for this purpose.







3. Remove crankcase ventilation tube. Unscrew the two M6 screws -arrows- for this purpose.







4. Disconnect plug -lower arrow- of the knock sensor and set it aside.







5. Unscrew screw -upper arrow- of the knock sensor and remove the knock sensor.

Installing Knock Sensor, Cylinder Bank 4 - 6
1. Clean contact surface for the sensor on the engine block.

NOTE: In order to guarantee the proper function of the knock sensor, always use the correct tightening torque







2. Position the knock sensor, then screw in and tighten the M8 hexagon-head bolt -upper arrow- with the correct tightening torque.

Tightening torque: 23 Nm (17 ftlb.)

3. Insert plug -lower arrow- of the knock sensor.







4. Install the crankcase ventilation tube. For this purpose, place the crankcase ventilation tube with the union nut -arrow- in position, but do not tighten yet.

NOTE: Always replace the flange seal of the crankcase ventilation tube.







5. Replace the flange seal; then place the two M6 screws -arrows- in position and tighten.

Tightening torque for hexagon-head bolts 10 Nm (7.5 ftlb.)







6. Tighten the union nut -arrow- with the correct tightening torque.

Tightening torque 30 Nm (22 ftlb.)

7. Install the oil container.