How do you relieve tension on the serpentine belt of the Ford 150 4.6 V8?

Answer 1

Relieve Serpentine Belt Tension. Before removing the belt, note its routing around all applicable pulleys for ease of installation. # Using a box end wrench on the tensioner pulley center bolt, rotate the tensioner assembly clockwise. # While holding the tensioner in this position, remove the alternator drive belt from one or two of the applicable pulleys.

Use a box end wrench to rotate the tensioner pulley assembly clockwise to relieve serpentine belt tension

# Slowly release the tensioner, and remove the box end wrench from the center bolt. # Remove the alternator drive belt from the remaining applicable pulleys. To install: When installing the drive belt on the pulleys, ensure that it is properly seated in all of the pulley grooves. # Using the box end wrench, rotate the tensioner clockwise again, then position the drive belt on all of the pulleys. # Slowly release the tensioner until it eliminates all drive belt slack. # Inspect the tensioner indicator to be sure that the belt is properly tensioned. If the belt tension is incorrect, the belt should be replaced with a new one, or, if installing a new belt, the belt may not be the correct belt for your vehicle. # Then start the engine. Ensure that the drive belt works properly. # Stop the engine, then double-check to ensure that the belt is properly seated on all applicable pulleys.