S10 Pickup, Sonoma 2000-2004

Rear Main Seal

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Removal & Installation



2.2L Engines

Please note that the transmission assembly and transfer case, if equipped, must be removed to perform this procedure.

Click image to see an enlarged view

Fig. Carefully pry the rear main oil seal out of its bore-2.2L engine

  1. Remove or disconnect the following:
    NOTE
    Be careful not to damage the crankshaft seal surface with the prying tool.



    Negative battery cable
     
    Transmission assembly and transfer case, if equipped
     
    Flexplate, if equipped
     
    Clutch assembly and flywheel, if equipped
     
    Crankshaft seal by prying it from out
     

  2.  

To install:

  1. Install the new rear seal by lubricating it with engine oil and using a seal tool J-34686.
  2.  
  3. Slide the seal over the mandrel until the dust lip bottoms squarely against the tool collar.

    Click image to see an enlarged view

    Fig. Rear main oil seal installation using tool J-34686-2.2L engine

  4.  
  5. Align the dowel pin of the tool with the dowel pinhole in the crankshaft and attach the tool to crankshaft.
  6.  
  7. Tighten the T-handle of the tool to push the seal into the bore. Continue until the tool collar is flush against the block.
  8.  
  9. Loosen the T-handle completely. Remove the attaching screws and tool. Check to be sure the seal is seated squarely in the bore.
  10.  
  11. Install or connect the following:

    Flywheel/clutch assembly or flexplate
     
    Transmission assembly and transfer case, if equipped
     
    Negative battery cable
     

  12.  
  13. Start the engine and check for leaks.
  14.  

4.3L Engines

Please note that the transmission assembly and transfer case, if equipped, must be removed to perform this procedure.

  1. Remove or disconnect the following:

    Negative battery cable
     
    Transfer case, if equipped
     
    Transmission
     
    Clutch assembly/flywheel or flexplate

    Click image to see an enlarged view

    Fig. Carefully pry the rear main seal out of the retainer-4.3L engine

     

  2.  
  3. Remove the crankshaft rear oil seal by inserting a suitable prying tool into the notches provided in the seal retainer and prying the seal out. Take care not to damage the crankshaft sealing surface.
  4.  

To install:

  1. Inspect the crankshaft for grit, rust or burrs and correct as necessary.
  2.  
  3. Clean the running surface of the crankshaft with a non-abrasive cleaner.
  4.  
  5. Install or connect the following:

    New rear seal lubricated with engine oil and a seal installer
     
    Flywheel and clutch or flexplate
     
    Transmission
     
    Transfer case, if equipped
     
    Negative battery cable
     

  6.  
  7. Start the engine and verify no oil leaks.
  8.  

 
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