Hi

The Idler pully is shot on my 2003 5.4L 4x4 Off road model. The question I have is, can I replace this pully without removing the serpentine belt? The belt does not go around this pully, it only rubs against it.

I am thinking I can have a helper relieve the belt tension, while I remove the old one and replace the new one. Does this sound like a plan? Will the belt fall off any of the pully's when I relieve the tension?

On another note, is there a special tool I need to replace the belt just in case I do need to remove it?

Thanks
Dwild