the 2 hoses going to the rad... lol
getting your hands on a factory service manual (FSM) would work wonders
if it's coolant then it'll most likely have a sweet smell to it when it's burning... when one of my coolant lines burst it smelt like buring syrup.. that's with that newfandangled orange coolant.
wipe the entire bottom of the engine bay down clean (pain i know) and then take it out, bring it back in and see if you can spot the leak...
but you shouldn't have any problems with the water pump leaking if its been replaced that lately...