Aspen 2007, Durango 2005-2007

Mechanical (Belt Driven) Fan


Removal & Installation

  1. Partially drain the cooling system.
  3. Remove the upper radiator hose.
  5. Remove the air filter housing assembly.
  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.
  9. Position the fan/fan drive assembly in the radiator shroud.
  11. Remove the two shroud mounting screws.
  13. Remove the radiator shroud and fan drive assembly.
    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.

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

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    Fig. Typical engine fan assembly

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    Fig. Remove the windshield washer bottle from the fan shroud

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    Fig. Loosening the fan nut

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    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

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    Fig. Removing fan and shroud together


To install:

  1. If drive and fan were separated, tighten the bolts to 17 ft. lbs. (23 Nm).
  3. The remainder of the installation procedure is the reverse of removal.
  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.

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.