Engine Oil Pressure Sensor Leak - keywords 07 block drip LBZ LMM seal sealing

This PI was superseded to update Recommendation/Instructions. Please discard PIP4153.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

The customer concern may be an engine oil leak. The dealer may find the oil leak is coming from Oil Pressure Sensor.

If a leak at the oil pressure sensor has been verified, reseal the sensor using the process below.

1. Replace the oil pressure sensor gasket (sealing washer) during the repair.
2. Properly clean and degrease the engine block surface and the oil pressure sensor threads. Use cleaner part number 12377981 (in Canada 10953463) or equivalent.
3. Dry the area with compressed air.
4. Use pipe sealer part number 12346004 (in Canada, 10953480) on the threads and the flange of the oil pressure sensor.
5. After the flange and the threads of the sensor have sealer on them reinstall the sensor and torque to 41 Nm.
6. Let sealer dry 4 to 6 hours and evaluate the repair.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.