I can't figure out how to move the belt tensioner to install new belt. All videos I've looked at keep showing me a different setup than my car. They all show the Vulcan motor instead of the Duratec. The tensioner has a bolt and if I turn it conterclockwise, it loosens the bolt that holds in the tensioner. If I turn clockwise, it tightens bolt but does not move the spring loaded tensioner so I can install belt. Is there a special tool needed here? Help!