I’ve got a 2002 honda civic that i just bought yesterday. i’ve got a pretty major leak right below the bottom hose that connects to the radiator and below the hose that connects to the bottom of the expansion tank. it’s causing me to overheat until i add water and there are very depleted amounts of water running in the bottom of that cross member. i wanted some opinions before i started pouring money and time into it. i’ve got some picture as well. bad bottom hose, bad expansion hose, or a bad radiator??

 

Fill it and use a coolant pressure tester while cold. Only way to actually check what is leaking, otherwise you'll just be parts changing.