Pacifica 2006-2008

Rear Main Seal

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Removal & Installation



3.5L Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the transaxle fluid.
  4.  
  5. Remove the negative battery cable.
  6.  
  7. Remove the transaxle, inspection cover and flywheel/flexplate.
  8.  
  9. Using a small prytool, carefully pry out the rear oil seal. Be careful not to nick or damage the crankshaft flange seal surface or the retainer bore.

    Click image to see an enlarged view

    Fig. Use a suitable prytool to remove the rear oil seal as shown-3.5L engine

  10.  

To install:

Click image to see an enlarged view

Fig. Installing the rear main oil seal-3.5L engine

  1. Place the Seal Pilot tool 6926-1 on the crankshaft.
  2.  
  3. Apply a light coating of engine oil to the entire circumference of the oil seal lip.
  4.  
  5. Place the seal over tool 6926-1 and use installer 6926-2 and handle C-4171 to drive the seal into place until it is flush with the housing surface.
  6.  
  7. Install the flexplate/flywheel and transaxle.
  8.  
  9. Connect the negative battery cable.
  10.  
  11. Fill the transaxle with the proper fluid.
  12.  
  13. Start the vehicle, check for leaks and repair if necessary.
  14.  

3.8L Engine
  1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Transaxle
     
    Flexplate
     
    Rear main seal
     

  4.  

To install:

  1. Place seal guide tool 6926-1 on the crankshaft and place the seal over the tool. Make sure the lip of the seal is facing towards the crankcase.
  2.  
  3. Install or connect the following:

    Rear main seal flush with the cylinder block surface using the tools illustrated.
     
    Flexplate
     
    Transaxle
     
    Negative battery cable
     

  4.  
  5. Run the engine and check for leaks.

    Click image to see an enlarged view

    Fig. Install the rear main seal flush with the cylinder block surface-3.8L engine

  6.  

4.0L Engine

NOTE
The engine oil pan may have to be removed from the vehicle in order to perform this operation.



Click image to see an enlarged view

Fig. Rear main seal and related components-4.0L engine

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove the negative battery cable.
  4.  
  5. Raise and support the vehicle safely.
  6.  
  7. Remove the transaxle.
  8.  
  9. Remove the flexplate.
  10.  
  11. Remove the seven upper retaining bolts.
  12.  
  13. Remove the two lower retaining nuts.
  14.  
  15. Remove the rear mail seal carrier from its mounting.
  16.  

To install:


NOTE
This installation procedure assumes that the seal protector is not missing or accidentally dislodged. If for any reason the installation sleeve is missing or dislodged from the rear crankshaft oil seal prior to installation the following must be performed. Using the chamfered seal guide from special tool 6926, insert the tampered end into the transaxle side of the rear crankshaft oil seal assembly and push the seal guide through the seal assembly. This will ensure that the seal lip is positioned toward the engine when the seal assembly is installed.



Click image to see an enlarged view

Fig. Special tool 6926 installation-4.0L engine

  1. Clean the sealant residue from the engine block and the oil pan.
    NOTE
    The seal retainer gasket is bonded to the retainer and must be replaced as an assembly.


    NOTE
    If a burr or scratch is present on the crankshaft edge (chamfer), clean the surface using 400 grit sand paper to prevent seal damage during installation. Be sure that the rear crankshaft oil seal surface is clean and free of any abrasive material.


    NOTE
    The rear crankshaft oil seal and retainer are an assembly. Do not separate the seal protector from the rear crankshaft oil seal before installation on the engine. Damage to the seal lip will occur if the seal protector is removed and installed prior to installation on the engine.



    Click image to see an enlarged view

    Fig. Rear main seal positioning-4.0L engine

  2.  
  3. Carefully position the oil seal retainer assembly and the seal protector on the crankshaft and push firmly into place on the engine block.
    NOTE
    During the above step the seal protector will be pushed from the rear oil seal assembly as a result of installing the rear oil seal.

  4.  
  5. Hand tighten the rear oil seal fasteners.
  6.  
  7. Attach special tool 8225 to the pan rail using the oil pan fasteners.
    NOTE
    The special tool is used to assist with the fit of the flush mount rear main seal retainer. The notch on the tool should be located away from the seal retainer.



    Click image to see an enlarged view

    Fig. Special tool 8225 installation-4.0L engine

  8.  
  9. While applying pressure to the seal retainer against the special tool, tighten the seal retainer screws to 105 inch lbs.
  10.  
  11. Remove the special tool. Be sure that the seal flange is flush with the block oil pan surface.
  12.  
  13. Continue the installation in the reverse order of the removal procedure.
  14.  

 
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