How do you tighten the belt tensioner on 2004 ford explorer 4.0l?

To tighten the belt tensioner on a 2004 Ford Explorer with a 4.0L engine, first, locate the tensioner pulley on the serpentine belt system. Use a wrench or a ratchet with a socket to turn the tensioner pulley counterclockwise, which will relieve tension on the belt. While holding the tensioner in this position, you can then remove or adjust the serpentine belt as needed. Once the belt is properly positioned, slowly release the tensioner to reapply tension to the belt.