300M, Concorde, Intrepid, LHS, 1998-2004

Removal & Installation

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The water pump has a die cast aluminum body and a stamped steel impeller. It bolts directly to the chain case cover using an O-ring for sealing. It is driven by the back side of the serpentine belt.

It is normal for a small amount of coolant to drip from the weep hole located on the water pump body (small black spot). If this condition exists, DO NOT replace the water pump. Only replace the water pump if a heavy deposit or steady flow of brown/green coolant is visible on the water pump body from the weep hole, which would indicate shaft seal failure. Before replacing the water pump, be sure to perform a thorough inspection. A defective pump will not be able to circulate heated coolant through the long heater hose.

2.7L 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 water pump is driven by the primary timing chain.



    Negative battery cable
     
    Upper radiator crossmember
     
    Fan module
     
    Accessory drive belts
     



    Crankshaft damper, timing chain cover, timing chain and all guides
     
    Water pump mounting bolts
     
    Water pump
     

  6.  
  7. Clean the water pump mounting surfaces.

    Click image to see an enlarged view

    Fig. Water pump mounting-2.7L engine

  8.  

To install:

  1. Install or connect the following:

    Water pump and gasket and torque the bolts to 105 inch lbs. (12 Nm)
     
    Guides, timing chain and timing chain cover
     
    Crankshaft damper and torque the center bolt to 125 ft. lbs. (170 Nm)
     
    Accessory drive belts
     
    Fan module and upper radiator crossmember
     
    Negative battery cable
     

  2.  
  3. Fill the cooling system to the proper level.
  4.  
  5. Start the vehicle, check for leaks and repair if necessary.
  6.  

3.2L & 3.5L Engines



  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the cooling system.
    WARNING
    Do not use pliers to open the plastic drain.

  4.  
  5. Remove or disconnect the following:
    NOTE
    It is good practice to turn the crankshaft until the No. 1 cylinder is at Top Dead Center (TDC) of its compression stroke (firing position).



    Negative battery cable
     
    Coolant recovery cap and open the thermostat bleed valve
     
    Drive belts
     
    Timing belt
     



    Water pump mounting bolts, noting the position of the longer bolt
     
    Water pump. Discard the O-ring seal.
     

  6.  
  7. Clean the gasket sealing surfaces, being careful not to scratch the aluminum surfaces.

    Click image to see an enlarged view

    Fig. Water pump bolt locations, make sure to note the position of the longer bolt

  8.  

To install:

  1. Install or connect the following:
    WARNING
    Rotate the pump and check for freedom of movement.



    New O-ring and wet with clean coolant prior to installation. Be sure to keep the new O-ring free of any oil or grease.
     
    Water pump with a new O-ring. Torque the water pump-to-engine bolts to 105 inch lbs. (12 Nm).
     



    Timing belt
     
    Drive belts
     

  2.  
  3. Fill the cooling system by performing the following procedure:
    1. Close the radiator drain.
    2.  
    3. Open the thermostat bleed valve. Install a 1 / 4 in. (6mm) clear hose about 48 in. (1.2m) long to the end of the bleed valve and the other end into a clean container. The intent is to keep coolant off of the drive belt(s).
    4.  
    5. Slowly, refill the coolant recovery bottle until a steady stream of coolant flows out of the thermostat bleed valve. Gently squeeze the upper radiator hose until all of the air is removed from the system.
    6.  
    7. Close the bleed valve and continue to fill the coolant recovery bottle to the proper level. Install the cap on the bottle and remove the hose from the bleed valve.
    8.  

  4.  
  5. Reconnect the negative battery cable. Start the engine and allow it to reach normal operating temperatures.
  6.  
  7. Check the cooling system for leaks and correct coolant level.
    WARNING
    Be sure that the thermostat bleed valve is closed once the cooling system has been bled of any trapped air.

  8.  

 
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