Andy, The belt will flex up and down as the go around. Don't try to adjust all the flex out. If you do then the belt would be so tight that it will put the alternator in a strain. With the wrong hose on the water pump or adjusting without enough clearance, this will eat into the hose. John Hervey www.specialTauto.com << I am having endless badluck with my delorean. I found a coolant leak last night due to my lights becoming dim and my alternator belt squeeking. The alternator belt has cut a hole in the RH coolant pipe and the coolant was making the belt slip. The coolant sprayed out and hit the belt and flung it all over the effing engine compartment. >>