right side of engine under all that stuff you see and while you are there might as well change the timimg belt. approx. 6 hrs by a pro
--- Well, I'm no pro so it took me longer than 6 hours. A couple good things to note though. You will need to make a special tool out of some angle iron in order to hold the harmonic balancer in place while removing the main crankshaft bolt. The balancer is cast so don't pry against the center ridge; it will break.
The water pump lives behind the timing covers (3 parts if I remember). I heavily recommend replacing the timing belt since it has to come off anyway. While removing the belt and the water pump, try not to accidentally bump the cam shafts. With the preasure from the valve springs, they are spring loaded to turn to one side or the other. Once the camshafts have been moved, it is possible to set them back to center but not very easy.
When replacing the timing belt, as always, it has to sit perfect on the teeth of all three gears(2 cams & 1 crank).
One problem I had after the repair was complete was it kept throwing serpentine belts. I found the Power Steering pump was mounted and tigntened to the block before the bracket. The bracket bolts should be tightened first then the block bolts.