Gas Recirculation Valve (egr Valve) problems of the 1998 Ford Taurus

Last summer, my 1998 Ford Taurus blew an engine. It was about 4000 miles over warranty. The garage told me that it was nothing that I had done. The problem was probably' a failure in the oil pump, that my car had experienced oil pressure problems. They also said that they regretted that my warranty had expired. I had to pay to replace a new engine. They sent in a rebuilt engine, replaced the bad engine, and extended the warranty to 100,000 miles. Then, this July (July 25,2003) I was driving the same 1998 Ford Taurus with the previously blown engine. The add coolant light came on. I immediately stopped the car. Water was pouring from either the radiator or hose. I called a tow truck and had the car towed home (about a distance of 60 miles). I had it towed to my local mechanic. On Monday morning, the mechanic called and said that I had many more problems that just a leak. He said it looked like I had a blown head gasket. He could not even get the car to start. Because the car was still under warranty, I had it towed to the bowling green Lincoln & Mercury in bowling green OH. This is where I had originally purchased the car and the place that had replaced the engine the previous summer. After waiting nearing two weeks to get permission from detroit (?) to fix it, an inspector was sent down to examine the damage. His report indicated that the problem was not from a defective engine, but from environmental contamination. They voided the warranty. I asked what environmental contamination meant. I was informed that the inspector had decided that my car had been in a flood. I was taken back. My car had not been in a flood. The mechanics, the service representative, and service manager all confirmed that there was absolutely no evidence that the car was in a flood. I personally heard the service manager talk to someone in detroit confirming that the car had not been in a flood. Detroit sent out another inspector who took flood samples from the car.