I have a '97 nissan pathfinder, i had the harmonic balancer replaced. Since the balancer was replaced the A/C belt continually comes off, put it on and as soon as i start the car the belt continually falls off, i tighten the tensioner as much recommended one time, than as much as i can, and everytime i start the car the belt immediately falls off. I have bought brand new belts twice in case they were not grooved right, but nothing works. it's stating to get warmer in florida and i need to get the A/C working. does anyone have any suggestions or know of a solution, please help.