I agree with Viss1. Had no problem getting a 3/8 breaker bar in from the top; actually had the bar handle forward of the tensioner for both removing and replacing. I stuck a screwdriver into the hole on the breaker bar handle for a little extra leverage when replacing- worked great. The hardest part was getting the new belt down thru the space between the pulleys and the fender.
My motto: Replace early, in the cool of your garage. Carry the OLD one for a spare.