My 82 308 is making an odd noise at idle when it is fully warmed up. It is coming from the right side of the motor and sounds like a noise caused by a rotating assembly or belt. The noise quickly dissapears once the engine is away from idle and it only occurs when the car is fully warm. I looked at the right side with the wheel and wheel well off while running (however the car had cooled down at this point) and listened to things with a long screwdriver to my ear and everything sounded normal. Got any ideas?