GM Malibu/Cutlass 1997-2000

Oil Pump

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REMOVAL & INSTALLATION



2.4L Engine
  1. Disconnect the negative battery cable.
  2.  
  3. Drain the engine oil into a suitable container.
  4.  
  5. Remove the oil pan, as outlined earlier in this section.
  6.  
  7. Remove the balance shaft chain cover and chain guide (tensioner).
  8.  
  9. Unfasten the oil pump bolts, then remove the pump cover.
  10.  
  11. Pull the housing to disconnect the gear from the balance shaft. Remove the oil pump housing assembly from the balance shaft assembly.
  12.  



Click image to see an enlarged view

Fig. On the 2.4L engine, the oil pump mounts to the balance shaft

To install:

  1. Position the oil pump and cover to the balance shaft housing. Tighten the pump-to-block bolts to 40 ft. lbs. (54 Nm).
  2.  
  3. Install the balance shaft chain tensioner. Tighten the bolt to 115 inch lbs. (13 Nm).
  4.  
  5. Install the balance shaft chain cover. Tighten the bolt to 115 inch lbs. (13 Nm).
  6.  
  7. Install the oil pan.
  8.  
  9. Connect the negative battery cable.
  10.  

3.1L Engine
  1. Disconnect the negative battery cable.
  2.  
  3. Raise and safely support the vehicle.
  4.  
  5. Drain the engine oil into a suitable container.
  6.  
  7. Remove the oil pan. For details, refer to the procedure located in this section.
  8.  
  9. Unfasten the crankshaft oil deflector bolts, then remove the crankshaft oil deflector.
  10.  
  11. Remove the oil pump retaining bolts, then remove the oil pump and pump driveshaft.
  12.  



Click image to see an enlarged view

Fig. View of the oil pump and drive assembly mounting-3.1L engine

To install:

  1. Prime the oil pump.
  2.  
  3. Install the oil pump and pump driveshaft. Tighten the oil pump mounting bolts to 30 ft. lbs. (41 Nm).
  4.  



Click image to see an enlarged view

Fig. Exploded view of the oil pump-3.1L engine

  1. Install the crankshaft oil deflector and mounting nuts. Tighten the mounting nuts to 18 ft. lbs. (25 Nm).
  2.  
  3. Install the oil pan. For details, please refer to the procedure located in this section.
  4.  
  5. Carefully lower the vehicle.
  6.  
  7. Fill the crankcase to the correct level with oil.
  8.  
  9. Start the engine, check the oil pressure and check for leaks.
  10.  

 
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