Crown Victoria, Grand Marquis, Town Car, 2006-2007

Rear Main Seal


Removal & Installation

If the vehicle is equipped with air suspension, the electrical power to the air suspension system must be shut off prior to hoisting, jacking or towing an air suspension vehicle. This can be accomplished by turning off the air suspension switch located in the luggage compartment. Failure to do so can result in unexpected inflation or deflation of the air springs, which can result in shifting of the vehicle during these operations. Failure to follow these instructions may result in personal injury.

  1. Remove or disconnect the following:

    Flexplate or flywheel

  3. With a sharp awl, carefully punch a small hole in the metal portion of the seal.
  5. Remove the seal using a slide hammer with a sheet metal screw attached.
    If the oil leak is coming from around the seal retainer, the retainer must also be removed and resealed.


To install:

  1. If the seal retainer was removed, carefully clean the sealant from the retainer and engine block using a plastic scraper. Remove any oil or grease residue from the sealing surfaces with a solvent.

    Click image to see an enlarged view

    Fig. Apply a continuous bead of silicone sealant to the back of the seal retainer before installing it on the engine

    Click image to see an enlarged view

    Fig. To avoid leakage, be sure to tighten the crankshaft rear oil seal retainer bolts in the correct sequence

  3. Apply silicone sealant to the back of the retainer and immediately install it on the engine block. Tighten the bolts in sequence to 89 inch lbs. (10 Nm).
  5. Lubricate the seal and the crankshaft with clean engine oil.
  7. Install the seal with the spring side toward the engine.
  9. Remove the installation tool.
  11. Install or connect the following:

    Flexplate or flywheel. Tighten the bolts, in a star pattern, to 59 ft. lbs. (80 Nm).
    Negative battery cable

  13. Check the engine oil level.
  15. Start the engine and check for leaks.