Drive Belt Tensioner - Automatic
WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
The drive belt tensioner will maintain correct belt tension if the correct length drive belt is on the engine. To verify that the drive belt tensioner is working correctly, check to see that the belt length indicator mark on the drive belt tensioner is between the minimum and maximum marks. Remove the drive belt and rotate the tensioner to verify that the tensioner does not stick, grab or bind. If the tensioner exhibits any of these conditions, install a new tensioner.