I have a 1995 Mitsubishi Montero LS with a 3.0L engine. About two days ago, while I was driving to work, I noticed that the temp. gauge was pegged out. I put some antifreeze in it thinking that it might have been a little low. I left work to go home in the afternoon and I didn't get very before the engine was way overheated. When I got out of the truck, I noticed that there was a trail of antifreeze behind the vehicle. Long story short, if I put antifreeze into the radiator, it flows through and pours out from some where behind or above the harmonic balancer. Could it be the water pump? More info: the radiator is badly rusted and corroded and has been since I have had it (about two years now). Any help?

Have somebody start the car up with the hood up and while they press the gas and you look under the hood you might be able to see where it is leaking out from.