Durango, 2001-2005

Mechanical (Belt Driven) Fan

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Removal & Installation




WARNING
If the viscous fan drive is replaced because of mechanical damage, the cooling fan blades should also be inspected. Inspect for fatigue cracks, loose blades, or loose rivets that could have resulted from excessive vibration. Replace fan blade assembly if any of these conditions are found. Also inspect water pump bearing and shaft assembly for any related damage due to a viscous fan drive malfunction.


NOTE
Gasoline engine fans have a standard RIGHT-HAND thread. Turn CCW to loosen.

  1. Disconnect the battery negative cable(s).
  2.  
  3. Disconnect the throttle cable if attached to the fan shroud.
  4.  
  5. Remove the windshield washer bottle and coolant overflow tank from the fan shroud.
  6.  
  7. Stop the water pump from turning with a special tool or prybar on the nuts. Loosen the fan nut (36mm). Turn CCW to loosen.
  8.  
  9. Remove the fan shroud mounting hardware. These may be bolts, clips or a combination of the two, depending on model.
  10.  
  11. Remove the fan and shroud together.
    WARNING
    Store the fan in the vertical (operating) position. If placed on its side, the silicone fluid in the viscous drive could drain into the bearing assembly and contaminate the lubricant.

  12.  
  13. To replace the fan or viscous drive, remove the four bolts and separate the components.

    Click image to see an enlarged view

    Fig. Typical engine fan assembly

    Typical engine fan assembly

    Click image to see an enlarged view

    Fig. Remove the windshield washer bottle from the fan shroud

    Remove the windshield washer bottle from the fan shroud

    Click image to see an enlarged view

    Fig. Loosening the fan nut

    Loosening the fan nut

    Click image to see an enlarged view

    Fig. To loosen the fan nut, stop the pump shaft from turning. This tool will do it; you could also use a prybar. In this photo, the fan has been removed for clarity

    To loosen the fan nut, stop the pump shaft from turning. This tool will do it; you could also use a prybar. In this photo, the fan has been removed for clarity

    Click image to see an enlarged view

    Fig. Removing fan and shroud together

    Removing fan and shroud together
  14.  

To install:

  1. If drive and fan were separated, tighten the bolts to 17 ft. lbs. (23 Nm).
  2.  
  3. The remainder of the installation procedure is the reverse of removal.
  4.  
  5. If a new viscous drive has been fitted, start and run the engine at 2,000 rpm for about 2 minutes to distribute fluid within the drive.
  6.  

  1. Partially drain the cooling system.
  2.  
  3. Remove the upper radiator hose.
  4.  
  5. Remove the air filter housing assembly.
  6.  
  7. Stop the water pump from turning with a special tool or prybar on the nuts. Loosen the fan nut (36mm). Turn CCW to loosen.
  8.  
  9. Position the fan/fan drive assembly in the radiator shroud.
  10.  
  11. Remove the two shroud mounting screws.
  12.  
  13. Remove the radiator shroud and fan drive assembly.
    NOTE
    After removing fan blade/viscous fan drive assembly, do not place viscous fan drive in horizontal position. If stored horizontally, silicone fluid in the viscous fan drive could drain into its bearing assembly and contaminate lubricant.

  14.  
  15. Remove four bolts securing fan blade assembly to viscous fan drive.

    Click image to see an enlarged view

    Fig. Typical engine fan assembly

    Typical engine fan assembly

    Click image to see an enlarged view

    Fig. Remove the windshield washer bottle from the fan shroud

    Remove the windshield washer bottle from the fan shroud

    Click image to see an enlarged view

    Fig. Loosening the fan nut

    Loosening the fan nut

    Click image to see an enlarged view

    Fig. To loosen the fan nut, stop the pump shaft from turning. This tool will do it; you could also use a prybar. In this photo, the fan has been removed for clarity

    To loosen the fan nut, stop the pump shaft from turning. This tool will do it; you could also use a prybar. In this photo, the fan has been removed for clarity

    Click image to see an enlarged view

    Fig. Removing fan and shroud together

    Removing fan and shroud together
  16.  

To install:

  1. If drive and fan were separated, tighten the bolts to 17 ft. lbs. (23 Nm).
  2.  
  3. The remainder of the installation procedure is the reverse of removal.
  4.  
  5. If a new viscous drive has been fitted, start and run the engine at 2,000 rpm for about 2 minutes to distribute fluid within the drive.
  6.  

The fan is threaded onto the water pump shaft with a 36mm nut. To loosen the nut, the pump must be prevented from turning. This can be accomplished with a special tool or with a prybar.

Fan and fan shroud are removed together.

 
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