I dont know if you had any luck finding any help. I've done some searching and have found some things that might be of interest to you. From what I've read sometimes the fan can be a real bummer getting off the pump. Here is a few things and a site you may want to look at to get a better insight. Good luck, I would say expect to take 3 -5 hours depending on what problems you run into.
This is for a 98 Durango but it should be similar.
Just thought I would post what so far has been the main sticking point to changing the water pump in my wifes 98 Durango. Evidently there are two types of hubs on the water pump for this particular year. The factory service manual states to use a screw driver around the hub bolts to keep the hub from rotating while you try to undo the 36mm nut connecting the fan assembly to the hub.
Well, naturally, mine has a pressed on hub. No bolts to pin a screw driver to! No matter how much I tried to hold that hub, - no way. I consulted with the local Dodge service department head who insisted they were all bolt on hubs, in any case, he said to keep the belt on to provide tension, put the 36mm wrench (longer the better) on the nut, and whack it with a hammer.
With the belt back on the tension was still not enough. Then I remembered that somewhere in my stuff I had an old fashioned pully spreader tool used to properly put tension on the old style auto belts.
I attached the spreader between the tensioner and the crankshaft hub, made it as tight as I could with my hand, and gave the wrench two moderate whacks.
Basically, the only special tool you need to do the job is a big adjustable wrench (to get the fan off). You'll need the pump, the small aluminum tube that more likely than not won't come out of your old water pump, and it would be a good idea to replace the hoses while its all torn down.
Honestly, I had never done it before and it only took me an hour or two.
You will need a second set of hands for a minute when getting the fan off (seemed safer to me than wedging something in the blades to break the nut free and tighten it back down).
But, the first thing I would do is go down to your local auto parts store and pick up a shop manual. Mine was a Haynes, and it really helps to know what order stuff SHOULD come off, exactly which screws and bolts are located where (saves tons of time), etc etc.
Tuesday, January 24th, 2006 AT 7:52 PM