Knock Sensor: Service and Repair

Removing And Installing Knock Sensor

Preliminary work
1. Remove intake-air distributor.
2. Remove and fold up cover for coolant regulator (thermostat).

Removing knock sensor
1. Mark and note the installation position of the knock sensor and pull off cable plug.







2. Unscrew fastening screw and take knock sensor out of the crankcase.

Installing knock sensor

NOTE: The knock sensor and the cable plug must be aligned so that they never touch.

ATTENTION:
Engine damage and changed exhaust behaviour due to incorrectly mounted knock sensors.
- The precise tightening torque for the knock-sensor screw must be observed, otherwise the proper function of the knock sensor is not ensured.
- The knock sensors must a aligned so that the sensor housing and the cable plug do not touch anywhere, otherwise proper functioning of the knock sensor is not ensured.







1. Install knock sensor. Make sure that the knock sensors are aligned according to the illustrations -longer arrow points to alignment, smaller arrow points to fastening screw-.







2. Tighten fastening screws. Tightening torque: 17 ftlb.
3. Push on cable plug and ensure that the cable plug does not touch.







Subsequent work
1. Install cover for coolant regulator (thermostat).
2. Install intake-air distributor.
3. Fill and bleed the cooling system.