Ram B1500, B2500, B3500, 1999-2003

Removal & Installation

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  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove or disconnect the following:

    Negative battery cables
     
    Wiring harness retainer
     
    Accessory drive belt
     
    Water pump

    Click image to see an enlarged view

    Fig. Exploded view of the water pump mounting-5.9L diesel engine

     

  6.  

To install:

  1. Install or connect the following:

    Water pump. Tighten the bolts to 18 ft. lbs. (24 Nm).
     
    Accessory drive belt
     
    Wiring harness retainer
     
    Negative battery cables
     

  2.  
  3. Fill the cooling system.
  4.  
  5. Start the engine and check for leaks.
  6.  


CAUTION
NEVER open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Avoid physical contact with the coolant. Wear protective clothing and eye protection. Always drain coolant into a sealable container. Clean up spills as soon as possible. Coolant can be reused as long as it is reasonably clean and free of debris. If you suspect contamination, or if it is more than a couple of years old, it should be replaced.

3.7L & 4.7L Engines



  1. Before servicing the vehicle, refer to the Precautions Section.
  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
     
    8 water pump 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 and 4.7L engines

  8.  

3.9L, 4.7L, 5.2L, 5.9L, 8.0L Gasoline Engines



  1. Carry out the "Common Steps" above.
  2.  
  3. Remove the upper radiator hose.
  4.  
  5. Remove the fan and shroud assembly.
  6.  
  7. On engines except 4.7L, remove the four water pump pulley bolts and remove the pulley.
  8.  
  9. Remove the heater hose pipe mounting bolt, if fitted.
  10.  
  11. On engines except 4.7L, loosen the bypass hose clamp at the water pump.
  12.  
  13. Remove the seven water pump mounting bolts and, on the 4.7L, one nut.
  14.  


WARNING
Bolts may be of different lengths. Be sure to note their locations.

To install:

  1. Reverse the removal procedure.
  2.  
  3. The 8.0L engine uses an O-ring to seal. Use a new one and lubricate it with petroleum jelly before installation of the pump. Also, use sealant on the threads of the heater hose pipe, position the pipe as shown before installing the pump and tighten the nut to 12 ft. lbs. (16 Nm).
  4.  
  5. On pushrod engines, connect the bypass hose to the pump while installing it.
  6.  
  7. Tighten the bolts to 30 ft. lbs. (40 Nm) on pushrod engines, 40 ft. lbs. (54 Nm) on the 4.7L engine.
  8.  
  9. Spin pump to ensure the impeller is not rubbing against the timing chain case.
  10.  
  11. When installing the heater hose pipe, ensure that the slot in the pipe bracket is bearing against the mounting bolt. This will hold the pipe in as far as possible to prevent leaks.
  12.  
  13. Tighten pulley bolts to 20 ft. lbs. (27 Nm) on V-6 and V-8, 16 ft. lbs. (22 Nm) on the V-10.
  14.  



Click image to see an enlarged view

Fig. Water pump mounting hardware-4.7L



Click image to see an enlarged view

Fig. Use a prybar to keep the water pump from rotating while pulley bolts are removed



Click image to see an enlarged view

Fig. Bypass hose clamp (arrow) must be tended to before removing the pump



Click image to see an enlarged view

Fig. Water pump bolts differ in length; note check location before installation-3.9L, 5.2L, and 5.9L gasoline engine shown



Click image to see an enlarged view

Fig. After removing the bolts, pull off the pump and place it in a safe location



Click image to see an enlarged view

Fig. Make sure the heater hose fitting is positioned as shown -V-10 engine

3.9L, 5.2L And 5.9L Engines



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove or disconnect the following:
    NOTE
    Do not store the fan clutch assembly horizontally, silicone may leak into the bearing grease and cause contamination.



    Negative battery cable
     
    Engine cooling fan and shroud
     



    Accessory drive belt
     
    Water pump pulley
     
    Lower radiator hose
     
    Heater hose and tube
     
    Bypass hose
     
    Water pump

    Click image to see an enlarged view

    Fig. Water pump mounting bolt locations-3.9L, 5.2L and 5.9L engines, 8.0L engine is similar

     

  6.  

To install:

  1. Install or connect the following:

    Water pump, using a new gasket. Tighten the bolts to 30 ft. lbs. (40 Nm).
     
    Bypass hose
     
    Heater hose and tube. Use a new O-ring seal.
     
    Lower radiator hose
     
    Water pump pulley. Tighten the bolts to 20 ft. lbs. (27 Nm).
     
    Accessory drive belt
     
    Engine cooling fan and shroud
     
    Negative battery cable
     

  2.  
  3. Fill the cooling system.
  4.  
  5. Start the engine and check for leaks.
  6.  

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Plastic air cleaner intake tube
     
    Engine cooling fan shroud. Remove the lower half first.
     
    Upper radiator hose
     

  6.  
  7. The thermal viscous fan drive/fan blade assembly is attached (threaded) to the water pump hub shaft. Remove the fan blade/fan drive assembly from water pump by turning the mounting nut counterclockwise (as viewed from front). Threads on the viscous fan drive are RIGHT HAND. A Snap-On® 36mm Fan Wrench (number SP346 from Snap-On® Cummins Diesel Tool Set number 2017DSP) can be used with Special Tool 6958 Spanner Wrench and Adapter Pins 8346 to prevent the pulley from rotating. Do not unbolt fan blade assembly from the viscous fan drive at this time.
    NOTE
    If water pump is being replaced, do not unbolt fan blade assembly from the thermal viscous fan drive.

  8.  
  9. Remove fan blade/fan drive assembly from vehicle
    NOTE
    Do not store the fan clutch assembly horizontally, silicone may leak into the bearing grease and cause contamination.



    Accessory drive belt
     
    Water pump pulley
     
    Lower radiator hose
     
    Heater hose and tube
     
    Bypass hose
     
    Water pump

    Click image to see an enlarged view

    Fig. Using Special Tool 6958 Spanner Wrench and Adapter Pins 8346



    Click image to see an enlarged view

    Fig. Water pump mounting bolt locations-3.9L, 5.2L and 5.9L engines

     

  10.  

To install:

  1. Install or connect the following:

    Water pump, using a new gasket. Tighten the bolts in a criss-cross pattern to 30 ft. lbs. (40 Nm).
     
    Bypass hose
     
    Heater hose and tube. Use a new O-ring seal.
     
    Lower radiator hose
     
    Water pump pulley. Tighten the bolts to 20 ft. lbs. (27 Nm).
     
    Accessory drive belt
     
    Engine cooling fan and shroud
     
    Plastic air cleaner intake tube
     
    Negative battery cable
     

  2.  
  3. Fill the cooling system.
  4.  
  5. Start the engine and check for leaks.
  6.  

5.7L Engines



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Accessory drive belt
     
    Engine cooling fan
     
    Coolant recovery bottle
     
    Washer bottle
     
    Fan shroud
     
    A/C compressor and alternator brace
     
    Idler pulleys
     
    Belt tensioner
     
    Radiator hoses
     
    Heater hoses
     
    Water pump
     

  6.  

To install:

  1. Install or connect the following:

    Water pump and tighten the bolts to 18 ft. lbs. (24 Nm)
     
    Heater hoses
     
    Radiator hoses
     
    Idler pulleys
     
    A/C compressor and alternator brace
     
    Fan shroud
     
    Washer bottle
     
    Coolant recovery bottle
     
    Accessory drive belt
     
    Negative battery cable
     

  2.  
  3. Fill the cooling system.
  4.  
  5. Start the engine and check for leaks.
  6.  

8.0L Engine



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove or disconnect the following:
    NOTE
    The 8.0L engine is equipped with a fan clutch that threads directly onto 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.



    Negative battery cable
     
    Washer solvent bottle
     
    Upper radiator hose
     



    Engine cooling fan and shroud
     
    Accessory drive belt
     
    Water pump pulley
     
    Lower radiator hose
     
    Heater hose
     
    Bypass hose
     
    Water pump
     

  6.  

To install:

  1. Install or connect the following:

    Water pump. Use a new O-ring seal and tighten the bolts to 30 ft. lbs. (40 Nm).
     
    Bypass hose
     
    Heater hose
     
    Lower radiator hose
     
    Water pump pulley. Tighten the bolts to 16 ft. lbs. (22 Nm).
     
    Accessory drive belt
     
    Engine cooling fan and shroud
     
    Upper radiator hose
     
    Washer solvent bottle
     
    Negative battery cable
     

  2.  
  3. Fill the cooling system.
  4.  
  5. Start the engine and check for leaks.
  6.  

Common Steps



  1. Disconnect the battery negative cable(s).
  2.  
  3. Drain the cooling system.
  4.  
  5. Remove the accessory drive belt.
  6.  
  7. Remove the lower radiator hose (except Diesel).
  8.  
  9. Disconnect the heater hose from the pump, if fitted.
  10.  


WARNING
Most cooling system hoses use "constant tension" hose clamps. When removing or installing, use a tool designed for servicing this type of clamp. The clamps are stamped with a letter or number on the tongue. If replacement is necessary, use only an OEM clamp with a matching ID.



Click image to see an enlarged view

Fig. Heater hose pipe O-ring (arrow): twist gently when removing or installing; check condition; lubricate with coolant before installing


CAUTION
Always wear safety glasses when servicing contact tension clamps.

  1. Always use a new gasket when installing the water pump. Clean mating surfaces thoroughly before installation.
  2.  
  3. This would be a good time to replace radiator hoses. At least, inspect them carefully for aging or other damage.
  4.  
  5. If the heater hose pipe was removed, use thread sealant or equivalent on the pipe threads (if threaded), or lubricate any O-rings with coolant before installing.
  6.  
  7. Check the accessory belt routing against the plate in the engine compartment before starting engine.
  8.  
  9. Allow the engine to reach operating temperature and check for leaks.
  10.  

Diesel Engines



  1. Carry out the "Common Steps" above.
  2.  


NOTE
Removal of the radiator hoses is not required.

  1. Remove the wiring harness bolt from the water pump and arrange the harness out of the way.
  2.  
  3. Remove the water pump mounting bolts and remove the pump.
  4.  

To install:

  1. Use a new O-ring and lubricate it with petroleum jelly before installation.
  2.  
  3. Tighten mounting bolts to 18 ft. lbs. (24 Nm).
  4.  



Click image to see an enlarged view

Fig. Water pump mounting-diesel

 
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