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Fordanswerman
Fordanswerman, Ford Motor Company Certified Tech
Category: Ford
Satisfied Customers: 3305
Experience:  Ford Engine Master/Transmission Master/Chassis Master=Ford Senior Master also Diesel 7.3/6.0
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Procedure for replaceing a rear main seal on a 4.6 V6 engine

Resolved Question:

Procedure for replaceing a rear main seal on a 4.6 V6 engine in a F159 2002 model
Submitted: 8 years ago.
Category: Ford
Expert:  Fordanswerman replied 8 years ago.

Thanks for the question.

 

Removal & Installation
4.2L, 4.6L, 5.4L & 6.8L Engines Without Retainer Plate

If the crankshaft rear oil seal replacement is the only operation being performed, it can be done in the vehicle as detailed in the following procedure. If the oil seal is being replaced in conjunction with a rear main bearing replacement, the engine must be removed from the vehicle and installed on a work stand.

Click image to see an enlarged viewRear main seal removal-2001-05 4.2L Engines; 2001-04 4.6L, 5.4L and 6.8L Engines without Retainer Plate Click image to see an enlarged viewAssembling the rear main seal and tools-2001-05 4.2L Engines; 2001-04 4.6L, 5.4L and 6.8L Engines without Retainer Plate Click image to see an enlarged viewInstall tools 303-518 and 303-S560 on the crankshaft-2001-05 4.2L Engines; 2001-04 4.6L, 5.4L and 6.8L Engines without Retainer Plate Click image to see an enlarged viewInstalling the seal-2001-05 4.2L Engines, 2001-04 4.6L, 5.4L and 6.8L Engines without Retainer Plate

 

  1. Before servicing the vehicle, refer to the Precautions Section.
  2. Disconnect the negative battery cable.
  3. Remove the transmission from the vehicle.
  4. Remove the flywheel/flexplate. If equipped, remove the crankshaft oil slinger from the crankshaft.
  5. Use an awl to punch 2 holes in the crankshaft rear oil seal. Punch the holes on opposite sides of the crankshaft and just above the bearing cap-to-cylinder block split line.
  6. Install a sheet metal screw in each hole. Use 2 small prybars to pry against both screws at the same time to remove the crankshaft rear oil seal. It may be necessary to place small blocks of wood against the cylinder block to provide a fulcrum point for the prybars. Use caution throughout this procedure to avoid scratching or otherwise damaging the crankshaft oil seal surface.
  7. Clean the oil seal recess in the cylinder block and main bearing cap.

To install:

  1. Clean, inspect and polish the rear oil seal rubbing surface on the crankshaft.
  2. Coat the new oil seal and the crankshaft with a light film of engine oil.
  3. Start the seal in the recess with the seal lip facing forward and install it with a seal driver. Keep the tool straight with the centerline of the crankshaft and install the seal until the tool contacts the cylinder block surface. Remove the tool and inspect the seal to be sure it was not damaged during installation.
  4. If equipped, install the crankshaft oil slinger.
  5. Position the flywheel on the crankshaft flange. Coat the threads of the flywheel attaching bolts with Loctite® and install the bolts. Tighten the bolts in sequence across from each other. See the Torque Specifications Chart.
  6. Install the transmission, following the recommended procedure.
  7. Install the negative battery cable. Click image to see an enlarged view
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