I have a guy who is putting in a new (actually used) motor in for me and "stuff" keeps happening. Now, I come in to see what was up, and it looks like oil is all over the floor and he is holding what looks like a seperate small cooler with an inlet and an outlet that circles like a "u" through a small (4x6) set of fins. he says it was attached to the back of the radiator. I dont know how this got damaged after a motor was replaced. What is this cooler for? Any ideas? I am sure if its shot, it will be hard to find. Please help?