I wanted to add some support to the front of the pump to keep it from moving under torque. I picked up a 9/16 bolt, a 9/16 rod end, and a steel bushing from the hardware store. I cut the head off the bolt, welded the bushing on and added the rod end. Not a true "tensioner" but I can remove the bolt from the water pump and adjust the rod end in or out as needed.