I am slowly dripping coolant from somewhere in the front right (facing the car) region of the engine bay. I recently replaced the water pump, and the weep hole is dry now so I have ruled that one out. I'm thinking it may actually be a crack in the radiator (it is not OEM, Aluminum 2 core which is about 2 years ol). Any input is appreciated.

Here is a link to a photo looking up at the bottom corner of the radiator. I am fairly certain the liquid dripping off the corners is coolant, even though it is dirty brown. (No, the coolant in my engine does not look like that)

http://imgur.com/JbONM16

 

Could be power steering or trans fluid. Check the levels of both and compare colors on a white paper towel.

 

on my old car i had a pinhole leak on the radiator. i found it by running the car to temp, then shutting it off completely. the coolant would heat up and steam out through tlyhe leak. this is the only time i would see it leaking, as it was too small to drip out under normal pressure apparently.