Cherokee, Grand Cherokee, 1999-2005

Oil Pump

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Removal & Installation



2.5L And 4.0L Engines
  1. Before servicing the vehicle, please familiarize yourself with safety procedures.
  2.  
  3. Drain the engine oil.
  4.  
  5. Remove or disconnect the following:
    NOTE
    If the oil pump is not to be serviced, do not disturb the position of the oil inlet tube and strainer assembly in the pump body. If the tube is moved within the pump body, a replacement tube and strainer assembly must be installed to assure an airtight seal.



    Negative battery cable
     
    Oil pan
     
    Oil pump and pickup tube
     

  6.  

To install:

Click image to see an enlarged view

Fig. Exploded view of the oil pump assembly-2.5L and 4.0L engine

  1. Install or connect the following:

    Oil pump. Torque the mounting bolts to 17 ft. lbs. (23 Nm).
     
    Oil pan
     
    Negative battery cable
     

  2.  
  3. Fill the engine with the proper type and quantity of oil.
  4.  
  5. Start the engine, check for leaks and repair if necessary.
  6.  

3.7L Engine
  1. Before servicing the vehicle, please familiarize yourself with safety procedures.
  2.  
  3. Remove or disconnect the following:

    Oil Pan
     
    Timing chain cover
     
    Timing chains and tensioners
     
    Oil pump
     

  4.  
  5. Installation is the reverse of removal. Torque the pump bolts, in sequence, to 21 ft. lbs. (28 Nm),

    Click image to see an enlarged view

    Fig. Oil pump bolt torque sequence-3.7L

  6.  

4.7L Engine
  1. Before servicing the vehicle, please familiarize yourself with safety procedures.
  2.  
  3. Drain the engine oil.
  4.  
  5. Remove or disconnect the following:

    Valve covers
     
    Front cover
     
    Timing chains and sprockets
     
    Oil pan and pickup tube
     
    Oil pump and primary timing chain tensioner
     

  6.  

To install:

  1. Install or connect the following:

    Oil pump and primary timing chain tensioner. Torque the bolts in sequence to 21 ft. lbs. (28 Nm).
     
    Oil pan and pickup tube
     
    Timing chains and sprockets
     
    Front cover
     
    Valve covers
     

  2.  
  3. Fill the engine with clean oil.
  4.  
  5. Start the engine, check for leaks and repair if necessary.

    Click image to see an enlarged view

    Fig. Oil pump and chain tensioner torque sequence-4.7L engine

  6.  

5.7L Engines
  1. Before servicing the vehicle, please familiarize yourself with safety procedures.
  2.  
  3. Remove the oil pan and pick-up tube.
  4.  
  5. Remove the timing chain cover.
  6.  
  7. Remove the four bolts, and the oil pump.
    WARNING
    Oil pump pressure relief valve and spring should not be removed from the oil pump. If these components are disassembled and or removed from the pump the entire oil pump assembly must be replaced.

  8.  
  9. Remove the pump cover.
  10.  
  11. Clean all parts thoroughly. Mating surface of the oil pump housing should be smooth. If the pump cover is scratched or grooved the oil pump assembly should be replaced.
  12.  
  13. Slide outer rotor into the body of the oil pump. Press the outer rotor to one side of the oil pump body and measure clearance between the outer rotor and the body. If the measurement is 0.235mm (0.009 in.) or more the oil pump assembly must be replaced.
  14.  
  15. Install the inner rotor in the into the oil pump body. Measure the clearance between the inner and outer rotors. If the clearance between the rotors is 0.150mm (0.006 in.) or more the oil pump assembly must be replaced.
  16.  
  17. Place a straightedge across the body of the oil pump (between the bolt holes), if a feeler gauge of 0.095mm (0.0038 in.) or greater can be inserted between the straightedge and the rotors, the pump must be replaced.
  18.  
  19. Reinstall the pump cover. Torque fasteners to 132 inch lbs. (15 Nm).
    NOTE
    The 5.7 Oil pump is released as an assembly. There are no DaimlerChrysler part numbers for sub-assembly components. In the event the oil pump is not functioning or out of specification it must be replaced as an assembly.

  20.  

To install:

  1. Position the oil pump onto the crankshaft and install the 4 oil pump retaining bolts.
  2.  
  3. Tighten the oil pump retaining bolts to 250 inch lbs. (28 Nm).
  4.  
  5. Install the timing chain cover.
  6.  
  7. Install the pick-up tube and oil pan.
  8.  

 
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