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OBSOLETE AT FACTORY - 43850 Fan Clutch Spanner Wrench Set, 5pc.

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For Removing and Installing Pressed and Bolt-on Water Pump Pulleys.

For removing and installing pressed-on or bolt-on water pump pulleys. Use with 1/2" ratchet or other square drive for flexibility in tight spaces. Comes in a blow molded case for storage.


  • 43580 is a double-sided tool that fits GM gas engines 2000 and newer, Jeep and Dodge 2000 and newer Except 2009 and newer Hemi. 

  • 43840 works on 2009 and newer Dodge Hemi. 

  • 43860 fits 2001 - 2013 GM Duramax diesels. 

  • 43870 works on 2011 and Newer Ford 6.7L diesels. 

  • 43890 fits all sizes of bolt on water pump pulleys and uses a unique cam design to hold the pulley by trapping one of the bolt heads.

Patent: 9,662,774

Available individually:

Part Number Description
43580 Fan Clutch Spanner Wrench GM Dodge
43840 Fan Clutch Spanner Wrench Dodge Hemi
43860 Fan Clutch Spanner Wrench GM Duramax
43870 Fan Clutch Spanner Wrench Ford Diesel
43890 Universal Fan Clutch Holding Wrench




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