Drive Belt Tensioner Replacement
What is a drive belt tensioner?
The serpentine belt tensioner, or drive belt tensioner, provides tension to the drive belts to ensure the belts stay in contact with the crankshaft pulley and the pulley that belt is meant to drive.
How does the drive belt tensioner work?
As drive belts are installed the belt tensioner is tightened to manufacturer's specifications, placing the proper amount of tension on the belt. It is bolted to the front of the engine, and the flat side of the drive or serpentine belt rests tightly against the belt tensioner pulley. When the belt is driven, the belt tensioner pulley constantly rotates, keeping tension on the belt.