Cherokee, Grand Cherokee, 1999-2005

Removal & Installation

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2.5L And 4.0L Engines




NOTE
The 2.5L and 4.0L engines covered use a reverse rotation water pump. The letter R is stamped on the impeller to identify. Engines from previous years may be equipped with forward rotation water pumps. Installation of the wrong water pump will cause engine over heating.



Click image to see an enlarged view

Fig. Reverse rotation water pump-2.5L and 4.0L engines

  1. Before servicing the vehicle, please familiarize yourself with safety procedures.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove or disconnect the following:
    NOTE
    Some 4.0L engines are equipped with a fan clutch that threads directly on to the water pump shaft. This fan clutch is equipped with right-hand threads.


    NOTE
    Do not store the fan clutch assembly horizontally, silicone may leak into the bearing grease and cause contamination.


    NOTE
    One of the water pump bolts is longer than the others. Note the location for reassembly.



    Negative battery cable
     
    Electric cooling fan connector
     
    Accessory drive belt
     
    Engine cooling fan and pulley
     



    Water pump pulley
     
    Power steering pump
     
    Lower radiator hose from the water pump
     
    Heater hose
     
    Water pump and discard the gasket
     

  6.  

To install:

  1. Clean the mating surfaces of all gasket material.
  2.  
  3. Install or connect the following:

    Water pump using a new gasket. Torque the bolts to 17 ft. lbs. (23 Nm).
     
    Heater hose
     
    Lower radiator hose
     
    Water pump pulley. Torque the bolts to 20 ft. lbs. (27 Nm).
     
    Power steering pump
     
    Engine cooling fan and shroud. Torque the bolts to 31 inch lbs. (3 Nm).
     
    Accessory drive belt
     
    Electric cooling fan connector
     
    Negative battery cable
     

  4.  
  5. Fill and bleed the cooling system.
  6.  
  7. Start the engine, check for leaks and repair if necessary.
  8.  

3.7L Engine



  1. Before servicing the vehicle, please familiarize yourself with safety procedures.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Fan and clutch assembly from the pump
     
    Fan shroud and fan assembly. If you-re reusing the fan clutch, keep it upright to avoid silicone fluid loss!
     
    Lower hose
     
    Water pump (8 bolts)
     

  6.  
  7. Installation is the reverse of removal. Tighten the bolts, in sequence, to 40 ft. lbs. (54 Nm).

    Click image to see an enlarged view

    Fig. Water pump tightening sequence-3.7L

  8.  

4.7L Engine



  1. Before servicing the vehicle, please familiarize yourself with safety procedures.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Fan and clutch assembly from the pump
     
    Fan shroud and fan assembly. If you-re reusing the fan clutch, keep it upright to avoid silicone fluid loss!
     
    Drive belt
     
    Lower radiator hose from the water pump
     
    Water pump
     

  6.  
  7. Clean the mating surfaces of all gasket material.
  8.  

To install:

Click image to see an enlarged view

Fig. Water pump torque sequence-4.7L engine

  1. Install or connect the following:

    Water pump using a new gasket. Torque the bolts to 40 ft. lbs. (54 Nm).
     
    Lower radiator hose
     
    Drive belt
     
    Negative battery cable
     

  2.  
  3. Fill and bleed the cooling system.
  4.  
  5. Start the engine, check for leaks and repair if necessary.
  6.  

5.7L Engines



  1. Before servicing the vehicle, please familiarize yourself with safety procedures.
  2.  
  3. Disconnect negative battery cable.
  4.  
  5. Drain coolant.
  6.  
  7. Remove serpentine belt.
  8.  
  9. Remove fan clutch assembly.
  10.  
  11. Remove coolant fill bottle.
  12.  
  13. Disconnect washer bottle wiring and hose.
  14.  
  15. Remove fan shroud assembly.
  16.  
  17. Remove A/C compressor and generator brace.
  18.  
  19. Remove idler pulleys.
  20.  
  21. Remove belt tensioner assembly.
  22.  
  23. Remove upper and lower radiator hoses.
  24.  
  25. Remove heater hoses.
  26.  
  27. Remove water pump mounting bolts and remove pump.
  28.  

To install:

  1. Install water pump and mounting bolts. Tighten mounting bolts to 18 ft. lbs.(24 Nm).
  2.  
  3. Install heater hoses.
  4.  
  5. Install upper and lower radiator hoses.
  6.  
  7. Install belt tensioner assembly.
  8.  
  9. Install idler pulleys.
  10.  
  11. Install A/C compressor and alternator brace. Tighten bolt and nuts to 21 ft. lbs. (28 Nm).
  12.  
  13. Install fan shroud assembly.
  14.  
  15. Connect washer bottle wiring and hose.
  16.  
  17. Install coolant fill bottle.
  18.  
  19. Install fan clutch assembly.
  20.  
  21. Install serpentine belt.
  22.  
  23. Connect negative battery cable.
  24.  
  25. Fill coolant.
  26.  
  27. Pressure test coolant system
  28.  

 
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