Mechanic recommended to replace belt as it appeared old and never done. I had no noise problems prior to replacing belt. But from the moment I picked up vehicle it made a loud screeching/squealing noise when I accelerate. I called him right back and he said it cant be the belt and must be something else. I took it back and he tried my old belt again and another new belt and he claims the noise is still present. His final answer was that its relating to the a/c compressor/clutch stating clutch part doesn't turn at same time - i dont understand any of this. All i know is I had no squeak problem prior to replacing belt. Any help is appreciated. The noise is kind of embarassing.