Discovery I (LJ) V8-4.0L (1996)
Knock Sensor: Service and Repair
KNOCK SENSOR
CAUTION: Due to the sensitivity of the sensors, do not apply tape or sealant to sensor threads.
Remove
1. Raise vehicle on hoist.
2. RH Sensor only: Remove bolt securing starter motor heatshield to RH engine mounting.
3. Release heatshield clip from starter solenoid.
4. Move heatshield aside for access to knock sensor.
5. Both sensors:
Disconnect sensor multiplug.
6. Remove sensor.
Refit
7. Clean sensor and mating face.
8. Fit sensor. Tighten to 16 Nm.
9. Connect sensor multiplug.
10. RH Sensor only: Manoeuvre heatshield into position.
11. Secure clip to solenoid.
12. Align bracket to mounting and fit bolt.
13. Lower hoist.
CAUTION: Failure to tighten sensor to correct torque will result in malfunction or sensor damage.