Serpentine Belt Step 2 - A serpentine belt is a normal service item that must be replaced when worn (glazed) or cracked.
Cracked Serpentine Belt Step 3 - The tensioner automatically holds the proper tension on the belt so there is no need for re-tightening like in older models. If the belt is loose, the tensioner has failed or the wrong belt size has been installed. A tensioner should be about half way between its throw to hold proper tension on the belt. Learn more
Serpentine Belt Tensioner Helpful Information