2002 Jeep Liberty Question: Do you think a leak up front off to the left and reddish in color, is radiator?

It started to leak a little then now there is quite a lot. It is up front and now we have it caught on a piece of white cardboard. We took it to the mechanic before this and they did a pressure test but they could not locate a leak. Now it is still leaking after sitting a couple of days. Is this the radiator and is it possible a new one is the answer? Jeep is not running hot, not yet anyway.