I have a 2003 Ford Taurus. 24 valve v6, automatic engine with 52k miles. It started making a squeaking or chirping noise towards the center and rear of the engine. I checked serpentine belt and it looks fine. When I start it it will make the noise for a few minutes and quit. When I am on the Interstate, it happens all of the time. The car is runnig fine it is just getting annoying.