As in, you pour it in, and it dumps right back out, without the engine even running?
Take a look at the hoses back there. If they look okay, look at the freeze plugs on the engine block. Over time they can get corroded and start to leak. It's an easy enough fix, provided you can get enough access to it to hammer in a new one. If you have any pictures or videos of the leak, I could probably be more help.