How do you change serpentine belt on 2003 ford F150 4.6?

Answer 1

use a 1/2 inch ratchet on the pivot point on the tensioner pulley, and turn to take tension off the belt...then slip the belt off all the other pulleys.

install the new one, by squeezing it into a small loop that can be inserted into the space between the tensioner, and the idler pulley, loop it onto all the pulleys per the diagram located on radiator cowling, take tension off the tension pulley, to get it back on completely and release the tension slowly..making sure it is lined up correctly on all pulleys