I did have the center through bolt loose and have been able to move the pulley with a screw driver. Its just that I can run the adjusting rod all the way down (tight) or all the way loosened and that pulley never moves a millimeter. The belt is the same one I removed for the water pump change. It is not a replacement. I'm leaning towards a bad belt tensioner. The tensioner can only go in one way so I don't see how that can be an issue. Trying the adjuster bolt collar swapped 180 deg out didn't make a difference. I have a drawing of the serpentine belt install (thank you anyway) prior to install and I know that is correct. The only thing I can think of is if there is another manner by which to install the adjuster bolt collar. Otherwise I eat another $200.00+ for the tensioner.