Joel,

I know that I have coolant leaking because I am losing it out of the tank
and I can see little puddles on the ground.  I have only taken short little
trips around town since having the water pump replaced.  I will inspect more
closely where exactly the leak is coming from.  It seems to be coming off
the square piece with ridges, but I think it is coming from higher up.  It
seems to be dripping in the middle or maybe a little bit left of the middle.
I also notice that when I turn the rear heater I smell the coolant burning
(maple syrup type smell) and when I turn it off it goes away.  I think the
heater core is a good possibility but I am at work and don't have a
screwdriver large enough to take off the cover to the heater.  There doesn't
seem to be any coolant on the floor though.  As to the rest of your
suggestions I thank you and I will purchase the books and begin my reading.

Thanks to everyone for all the suggestions and don't be afraid to offer
more.

Mike