GM Cadillac Deville_Fleetwood_ELD_Seville 1990-1998

Rear Main Seal

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REMOVAL & INSTALLATION



3.0L Engine

NOTE
The special tool required for this procedure is the J 42067 Rear main oil seal installer

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the flex plate.
  4.  
  5. Remove the rear main oil seal.
    1. Center punch the steel ring of the seal.
    2.  
    3. Carefully drill a small, shallow, pilot hole into the steel ring of the seal.
    4.  
    5. Screw in a self-tapping screw.
    6.  
    7. Remove the seal by pulling it out with pliers.
    8.  
    9. Use caution when drilling the hole to prevent damage the engine components on the opposite side of the seal.
    10.  

  6.  

To install:

  1. Install the rear main oil seal.
    1. Coat lip of the seal with a small amount of chassis grease to aid in installation.
    2.  
    3. Install the new seal using the special tool J 42067.
    4.  

  2.  
  3. Install the flex plate.
  4.  
  5. Connect the negative battery cable.
  6.  

4.5L and 4.9L Engines

NOTE
To perform this procedure, use a Seal Removal tool J-26868 or equivalent, and a Seal Installer tool J-34604 or equivalent.

  1. Remove the transaxle.
  2.  
  3. Unbolt and remove the flexplate from the rear end of the crankshaft.
  4.  
  5. Using a Seal Removal tool J-26868 or equivalent, remove the old seal. Thoroughly clean the seal bore of any leftover seal material with a clean rag.
  6.  
  7. Lubricate the lip of a new seal with wheel bearing grease. Position it over the crankshaft and into the seal bore with the spring facing inside the engine.
  8.  
  9. Using a Seal Installer tool J-34604 or equivalent, press the seal into place. The seal must be square (this is the purpose of the installer) and flush with the block to 1 mm indented.
  10.  
  11. To complete the installation, reverse the removal procedures. Tighten the flexplate-to-crankshaft bolts to 37 ft. lbs. (52 Nm). Refill the crankshaft. Operate the engine and check for leaks.
  12.  



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Fig. Rear main seal removal tool-4.5L and 4.9L engines



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Fig. Rear main seal installation tool-4.5L and 4.9L engines

4.6L Engine
  1. Remove the transaxle assembly.
  2.  
  3. Remove the flexplate.
  4.  
  5. Use a suitable prying tool between the seal lips and the crankshaft and remove the seal.
  6.  


WARNING
Use extreme care to avoid damage to the crankshaft sealing surface. NOTE: The preferred method for removing the seal is by drilling a 1 / 8 -inch hole in the metal seal body and removing with a body dent puller (slide hammer).

To install:

  1. Place a small amount of RTV sealant at the crankshaft split line across the end of the upper/lower crankshaft seal.
  2.  
  3. Lubricate the rear main seal sealing lips with engine oil and slide the seal over the arbor of the seal installer J 38817. The greater spring faces in.
  4.  
  5. Thread the seal installer J 38818 into the crankshaft flange and install the seal by turning the handle until it bottoms against the crankcase.
  6.  
  7. Install the flywheel.
  8.  
  9. Install the transaxle assembly.
  10.  



Click image to see an enlarged view

Fig. Rear main seal installation-4.6L Northstar engine



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Fig. Installing the rear main seal-4.6L Northstar engine

 
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