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Oil leaking from thread of oil sensor on ef falcon.

Oil is leaking from the thread of the sensor on 6cyl falcon. Can it be repaired by applying a suitable thread sealant.

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Possibly,the sealant used should be the white teflon that comes in tape form or as a liquid in a small squeeze bottle.The liquid form,you would want the threads free of oil,the teflon tape,oil present doesn't matter,although the tape should be applied to the threads in the opposite direction of the threads.The threads would screw into the block clockwise,so apply the tape from the counter clockwise direction.It is also possible that the sending unit itself has a small crack somewhere,and these sending units aren't all that expensive,so i would install a new unit while using the teflon.

Posted on Nov 04, 2008


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Engine Oil Pressure Sensor / Switch Replacement Removal & Installation 4.3L Engine To Remove:
Oil pressure sensor removal/installation (4.3L engine shown) gm-04-43-572.gif

  1. Clean the area near the oil pressure sensor.
  2. Remove the distributor.
  3. Disconnect the electrical connector from the oil pressure sensor.
  4. Using J 41712 or equivalent, remove the oil pressure sensor from the fitting. NOTE: Note the orientation of the oil pressure sensor fitting before attempting to remove it. This is so it can be installed in the original position.
  5. Remove the oil pressure sensor fitting, if necessary.
To Install:
NOTE: If the fitting has been removed, clean and apply sealant to the threads before installing it.
  1. Install the fitting until snug, if it was removed.
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  2. Apply sealant to the threads of the sensor.
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4.8L, 5.3L & 6.0L Engine To Remove:
  1. Remove the engine sight shield. chevy_aval15_02-04_opcon.gif

  2. Disconnect the oil pressure sensor electrical connector. chevy_aval15_02-04_opsocket.gif

  3. Using J41712 sensor socket or equivalent, remove the oil pressure sensor.
To Install:
  1. Apply sealant GM P/N 12346004, (Canadian P/N 10953480), or equivalent, to the threads of the sensor.
  2. Using J41712 sensor socket or equivalent, install the oil pressure sensor.
    • Tighten the sensor to 15 ft. lbs. (20 Nm).
  3. Connect the oil pressure sensor electrical connector.
  4. Install the engine sight shield.
6.6L Diesel Engine To Remove:
  1. Raise and safely support the vehicle NOTE: Clean the area around the sensor. Do not allow debris to enter the engine
    6.6L Oil pressure sensor gm_trk_sil25_02-04_66_oil_press_sensr.gif

  2. Remove or disconnect the following:
    • Engine oil pressure sensor electrical connector
    • Engine oil pressure sensor using a suitable tool
To Install:
  1. Apply sealant to the threads of the oil pressure sensor
  2. Install or connect the following:
    • Engine oil pressure sensor and tighten the sensor
      1. Torque to: 22 ft. lbs. (30 Nm)
    • Engine oil pressure sensor electrical connector
  3. Lower the vehicle
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  1. Remove the engine appearance cover.
  2. Disconnect the electrical connector from the oil pressure sensor.
  3. to remove the sensor.
To Install:
  1. If installing the old sensor, apply sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent, to the threads of the sensor.
  2. Using J 41712 or equivalent, install the sensor.
    • Tighten the sensor to 22 lb ft (30 Nm).
  3. Connect the oil pressure sensor electrical connector.
  4. Install the engine appearance cover.
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