Just wanted to let everyone know. You do not need to take the timing chain off to remove the waterpump driveshaft. I loosened the cam sprocket, moved it forward as far as it could go, and pryed the waterpump driveshaft right out and there was just enough room for it to slide out.

 

why would you need to anyway? the collar is the only thing that needed to be removed.. Mine was like that for 45K miles..