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Leave the belt on while removing the fan clutch. Leaving the belt on doesn't always work, and did not in my case. There are two other options that should work. One is to take off the serpentine belt and use a strap wrench to hold the water pump pulley in place while turning the fan clutch nut. The second is to make your own tool. I took a strip of metal and drilled two holes in it that matched the distance between holes on the water pump pulley. This distance was around 3" for me. I then put two bolts through the holes that were big enough to fit in the water pump pulley holes and nutted the bolts so they were tight against the strip of metal. I then put the bolts into the water pump pulley and held the strip in place with a wrench wedged against the engine block while I turned the nut. A more complete tool could be made by welding or bolting a long handle onto the strip so it can be easily held and keep the puley from rotating.

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โˆ™ 2006-10-02 16:45:48
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Q: How can you keep the water pump pulley from turning while you loosen the nut on the fan assembly of a 1999 dodge durango?
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