Re: Water pump failing?
No special wrenches that I am aware of, if you don't consider a set of Torx sockets special.
Pay close attention to where the bolts came from, they are all various sizes / lengths.
It is best to lay the new pump close by and put each bolt into the corresponding hole on the new pump as you remove them.
Once the old pump is out, transfer all the bolts back to it, then one at a time back into the new pump as you put it on.
At 77K, I'd recommend a cooling flush and new 50/50 Zerex G05 and distilled water.
It's a relative easy job once you remove the cooling fan to gain access.