My mom's car needs a new fan belt. I have not bought the belt yet but was under the car just checking things out and did not see a tensioner pulley like I have on my truck. In the owners manual it showed both the 2.5 and 3.5 diagram and there was a label for a tensioner on the 2.5 but didn't show one on the 3.5's diagram. It wasn't that much help. So, how do I change the belt? I just need to change the main belt that runs on the crank, alt. pulley, etc.