Her's some good engine pics:
The tensioner pulley and altenator idler pulley are in this image from the "new" contour site:
Duratec belt sideThe tensioner is above the main crank pulley, the idler is to the left.
The waterpump pulley is
trans side duratec The waterpump tensioner can rattle.
You can test the pulleys by listening through a mechanics stethoscope sold at sears for 10 bucks. The "moving" of the sound is wierd! Maybe you hear the fuel injectors.
