GM Bonneville/Eighty Eight/LeSabre 1986-1999

Oil Pan

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REMOVAL & INSTALLATION



See Figures 1, 2 and 3

  1. Disconnect the negative battery cable. Raise and safely support the vehicle.
  2.  
  3. Drain the engine oil into a suitable container.
    1. Remove the transaxle converter cover.
    2.  

  4.  
  5. For 1987-90 vehicles, remove the starter motor from the vehicle, as outlined in Engine Electrical .
  6.  
  7. Remove the oil filter.
  8.  
  9. If equipped, disconnect the oil level sensor.
  10.  
  11. For 1996-99 vehicles, remove the oil level sensor. On these vehicles, the oil level sensor must be removed prior to removing the pan. If the pan is removed first, damage to the sensor may occur.
  12.  
  13. Remove the oil pan-to-engine bolts and the oil pan. Remove and discard the oil pan gasket. The formed rubber oil pan gasket cannot be reused.
  14.  
  15. If necessary, remove the oil pump pipe and screen.
  16.  



Click image to see an enlarged view

Fig. Fig. 1: Unfasten the retaining bolt(s), then remove the oil pump pipe and screen, if necessary

  1. Thoroughly clean the gasket mounting surfaces.
  2.  



Click image to see an enlarged view

Fig. Fig. 2: Exploded view of the oil pan and related components - 1993 vehicle shown



Click image to see an enlarged view

Fig. Fig. 3: Oil pan and related components - 1996 vehicle shown

To install:
  1. If removed, install the oil pump pipe and screen. Secure with the retaining bolt(s) and tighten to 89 inch lbs. (10 Nm).
  2.  
  3. Place a new formed rubber gasket in the oil pan flange.
  4.  
  5. Position the oil pan and secure with the oil pan-to-engine bolts. Tighten the bolts to 124 inch lbs. (14 Nm). Do NOT overtighten the bolts, as this will damage the oil pan, causing a leak.
  6.  
  7. For 1987-90 vehicles, install the starter motor and transaxle converter cover.
  8.  
  9. Install a new oil filter.
  10.  
  11. For 1996-99 vehicles, install the oil level sensor.
  12.  
  13. If equipped, connect the low oil level sensor wire.
  14.  
  15. Carefully lower the vehicle.
  16.  


WARNING
Operating the engine without the proper amount and type of engine oil will result in severe engine damage.

  1. Fill the crankcase with the proper type and amount of engine oil.
  2.  
  3. Connect the negative battery cable, then start the engine and check for leaks. Check the oil level and add if necessary.
  4.  

 
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