There's a small hose (3/4"?) that runs from the water pump to the heater valve. It's a little over a foot long and has a number of bends and turns. Anyone know the part number or how I can find it?

 

This one maybe? http://www.rockauto.com/en/moreinfo....035807&jsn=474



The easy way is to open RockAuto.com, find your car in the list, then look for heat & A/C since it's a heater hose. Then you look through the available hoses for a match.

For that extra bit of belt plus suspenders peace of mind, Gates, Dayco, and so forth have websites with online catalogs, and good parts stores have printed catalogs, and those catalogs have cross reference sections and illustrations to help folks find the correct hoses.