Dakota, 2001-2005

Rear Main Seal

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Removal & Installation



3.7L & 4.7L Engines
  1. Before servicing the vehicle, please familiarize yourself with safety procedures.
  2.  
  3. Remove or disconnect the following:

    Transmission
     
    Flexplate
     

  4.  
  5. Thread Oil Seal Remover 8506 into the rear main seal as far as possible and remove the rear main seal.
  6.  

To install:

  1. Install or connect the following:

    Seal Guide 8349-2 onto the crankshaft
     
    Rear main seal on the seal guide
     
    Rear main seal, using the Crankshaft Rear Oil Seal Installer 8349 and Driver Handle C-4171; tap it into place until the installer is flush with the cylinder block
     
    Flexplate. Tighten the bolts to 45 ft. lbs. (60 Nm).
     
    Transmission
     

  2.  
  3. Start the engine and check for leaks.
  4.  

3.9L & 5.9L Engines
  1. Before servicing the vehicle, please familiarize yourself with safety procedures.
  2.  
  3. Drain the engine oil.
  4.  
  5. Remove or disconnect the following:

    Oil pan
     
    Oil pump
     
    Rear main bearing cap
     

  6.  
  7. Loosen the other main bearing cap bolts for clearance and remove the rear main seal halves.
  8.  

To install:

  1. Install or connect the following:

    New upper seal half to the cylinder block
     
    New lower seal half to the bearing cap
     

  2.  
  3. Apply sealant to the rear main bearing cap.

    Click image to see an enlarged view

    Fig. Sealant application locations -3.9L and 5.9L engines

  4.  
  5. Install or connect the following:

    Rear main bearing cap. Tighten all main bearing cap bolts to 85 ft. lbs. (115 Nm).
     
    Oil pump and oil pan
     

  6.  
  7. Fill the engine.
  8.  
  9. Start the engine and check for leaks.
  10.  

 
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