GM Lumina/Grand Prix/Cutlass Supreme/Regal 1988-1996

Rear Main Bearing Oil Seal

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REMOVAL & INSTALLATION



2.2L Engine

See Figures 1 and 2



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Fig. Fig. 1: Use a suitable prytool to carefully remove the rear main seal-2.2L engine



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Fig. Fig. 2: Install the rear main seal with the special tool

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the transaxle.
  4.  
  5. Use a suitable tool to prevent crankshaft rotation, then unfasten the flywheel-to-crankshaft bolts and remove the flywheel. Inspect for a rear main seal leak.
  6.  


WARNING
Be very careful not to damage the crankshaft seal surfaces with the prytool.

  1. Remove the seal by carefully inserting a suitable prytool in through the dust lip. Pry out the seal, moving the tool around the seal as required until the seal is removed.
  2.  

To install:
  1. Lubricate the seal bore-to-seal surface with clean engine oil.
  2.  
  3. Install a new seal using tool J 34686 or equivalent, as follows:
    1. Slide the new seal over the mandrel until the dust lip bottoms squarely against the tool collar.
    2.  
    3. Align the dowel pin of the tool with the dowel pin hole in the crankshaft and attach the tool to the crankshaft. Tighten the attaching screws to 44 inch lbs. (5 Nm).
    4.  
    5. Tighten the "T'' handle of the tool to push the seal into the bore. Continue until the tool collar is flush against the block.
    6.  
    7. Loosen the "'T'' handle completely. Remove the attaching screws and the tool. Check to make sure the seal is properly seated in the bore.
    8.  

  4.  
  5. Install the flywheel and the transaxle.
  6.  
  7. Connect the negative battery cable. Check the oil level and add, if necessary. Start the engine and check for leaks.
  8.  

2.3L Engine

See Figure 3



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Fig. Fig. 3: Exploded view of the rear main seal-2.3L engine

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the transaxle, as outlined in Drive Train .
  4.  
  5. If equipped with a manual transaxle, remove the clutch and clutch cover. Mark the relationship of the pressure plate to the flywheel for reassembly in the same position for proper balance.
  6.  
  7. Unfasten the flywheel-to-crankshaft bolts, then remove the flywheel.
  8.  
  9. Remove the 2 the oil pan-to-seal housing bolts.
  10.  
  11. Unfasten the 6 seal housing-to-block bolts, then remove the seal housing and gasket.
  12.  
  13. Support the seal housing for seal removal using two wood block of equal thickness. With the wood blocks on a flat surface, position the seal housing and block so the transaxle side of the seal housing is supported across the dowel pin and center bolt holes on both sides of the seal opening.
  14.  

The seal housing could be damaged if it is not properly supported during seal removal.

  1. Drive the crankshaft/rear main seal evenly out of the transaxle side of the seal housing using a small chisel in the relief grooves on the crankshaft side of the seal housing.
  2.  


WARNING
Use care to avoid damage to the seal housing sealing surface. Damage to the sealing surfaces will result in an oil leak.

To install:
  1. Press a new seal into the housing using tool J 36005 or equivalent seal installer.
  2.  
  3. Inspect the oil pan gasket inner silicone bead for any damage and replace if necessary. Also inspect the silicone across the top of the aluminum carrier at the oil pan, to cylinder block, to the seal housing three way joint. If these strips are damaged, they may be repaired using a suitable silicone sealant. Use only enough sealant to restore the silicone strips to their original dimension.
  4.  

Excessive application of the sealant may cause part misalignment and oil leaks.

  1. Position the seal housing to the block gasket over the alignment dowel pins. The gasket is reversible. No sealant is necessary unless a gasket repair was necessary.
  2.  
  3. Lubricate the lip of the rear main seal with clean engine oil.
  4.  
  5. Position the seal housing assembly and secure with the housing-to-cylinder block bolts. Tighten to 106 inch lbs. (12 Nm).
  6.  
  7. Install the oil pan-to-seal housing bolts and tighten to 106 inch lbs. (12 Nm).
  8.  
  9. Install the flywheel and tighten the bolts evenly to the specifications listed in this section. Use tools J 36660 and J 37086 to prevent crankshaft rotation.
  10.  
  11. If equipped with a manual transaxle, install the clutch and clutch cover.
  12.  
  13. Install the transaxle, as outlined in Drive Train of this repair guide.
  14.  
  15. Connect the negative battery cable, then start the engine and check for leaks.
  16.  

2.5L Engine
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the transaxle assembly, as outlined in Drive Train .
  4.  
  5. Remove the flywheel.
  6.  
  7. Carefully pry out the seal, using a suitable tool.
  8.  

To install:
  1. Clean the the block and crankshaft to seal mating surfaces.
  2.  
  3. Apply clean engine oil to the inside and outside diameter of the new seal. A or equivalent seal installer.
  4.  
  5. Install the flywheel and transaxle.
  6.  
  7. Connect the negative battery cable, then start the engine and check for leaks.
  8.  

2.8L, 3.1L, 3.4L and 3.8L Engines

See Figures 4, 5 and 6



Click image to see an enlarged view

Fig. Fig. 4: When removing the rear main seal, make sure not to scratch the seal bore



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Fig. Fig. 5: Lubricate the new seal with clean oil, then position on the tool



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Fig. Fig. 6: Align the dowel pin of the tool with the dowel pin hole in the crankshaft and attach the tool to the crankshaft

These engines use a round rear oil seal that requires removal of the transaxle and flywheel.

  1. Support the engine with tool J-28467 or equivalent. Raise and safely support the vehicle.
  2.  
  3. Remove the transaxle assembly, as outlined in Drive Train .
  4.  
  5. Remove the flywheel, as outlined later in this section.
  6.  
  7. Using a small prybar or equivalent, insert it through the dust lip at an angle shown in the accompanying figure. Pry the seal out by moving the handle of the tool toward the end of the crankshaft pilot. Repeat as required around the seal until it is removed.
  8.  

To install:
  1. Inspect the seal bore and the crankshaft end for any damage.
  2.  
  3. Coat the inside lip of the seal with clean engine oil.
  4.  
  5. Install a new seal using tool J 34686 or equivalent, as follows:
    1. Slide the new seal over the mandrel until the dust lip bottoms squarely against the tool collar.
    2.  
    3. Align the dowel pin of the tool with the dowel pin hole in the crankshaft and attach the tool to the crankshaft. Tighten the attaching screws to 44 inch lbs. (5 Nm).
    4.  
    5. Tighten the "T'' handle of the tool to push the seal into the bore. Continue until the tool collar is flush against the block.
    6.  
    7. Loosen the "'T'' handle completely. Remove the attaching screws and the tool. Check to make sure the seal is properly seated in the bore.
    8.  

  6.  
  7. Install the flywheel and the transaxle.
  8.  
  9. Connect the negative battery cable. Check the oil level and add, if necessary. Start the engine and check for leaks.
  10.  

 
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