I was investigating a squeek that sounded like a pulley bearing or sumthing like that is it's sound varried with RPM. I removed the belt to have a see if any of the pulleys were loose or there was obvious play in any one of them. I found that the rear most idler pully had a fair bit of play in it. Last time I changed the belt I did not notice it (last year). Does anyone know if this is normal, or what the tolerance should be?