A 5.4 should be a relatively easy job. Toward the left side of the engine is your tensioner. There should be a cover over it. Remove the cover and turn the bolt so that it releases the tension on the belt. After that, pull the belt off and replace with the new one. Make a diagram of the belt's route if you can't remember it.

Answered by catch_15
1 question asked

The tensioner is on the left of the motor about midway down, there is no cover on it though. The end of the tensioner where the pulley is will have a square female drive in it for a ratchet. Getting your hand between the shroud and the fan and working the ratchet into the drive is a little tricky though. When you get the retchet in push down to releive tension and remove the belt from any pulley SLOWLY let the tensioner come back up. There should be a belt routing diagram under the hood. Good luck.

Answered by rags729
1 question asked

I have a 4.6 in a Mustang, so mine's not completely the same. But the procedure is the same.

Answered by catch_15
1 question asked