Antifreeze/coolant Leak?

Take it back to the mechanic that did all the work and have him fix it for free. If you spent that much money on the car it shouldn't have that kind of problem. Could be as simple as a loose hose clamp.

Ditto to what T.A. advised you. Then sell it.

Also tell the mechanic that is he doesn't back up his work you will report him to the Better Business Bureau. Don't let him tell you that what happened has nothing to do with his fix because it does.

Here's what was suggested to me in another forum: "Check the raised rectangle surface where the "Caution Fans May Start" sticker is. I know a lot of 2gn radiators have developed a crack in the rectangle and leaked there." I wiped everything down, started the engine, and within a minute or so, fluid started leaking from that exact spot. After I wiped everything clean, I could see a narrow crack maybe 1.5" long. So, here's my dilemma: Considering all the work I had done, whose responsibility is this? No work was done on the radiator. If my old engine was taken out and the replacement engine put in, would the mechanic have much/any contact with the radiator? I'm assuming that's my original radiator and not part of the engine replacement. Please correct me if I'm wrong. I'm wondering if they could have knocked something heavy against that spot when the were changing the engines. I just don't know how to approach my mechanic about this. I have put $6,500 into that car over the past three months, yet if they're not responsible for that radiator crack, then I have no beef with them. I'm just broke and would appreciate any and all input about how this might have happened and how I should approach my mechanic. Thank you!!