you have to put a socket wrench into the hole on the tensioner and pull up on it to release the tension from the belt.
The serpentine belt on a 2003 Dodge Dakota is replaced by loosening the belt tensioner and slipping the belt off. It can then be removed from the engine accessories and a new belt installed.
you dont, it has a spring loaded tensioner
Spring loaded belt tensioner on the lower driver side.
Release the pressure on the belt tensioner and belt should slide off pulleys
The belt tensioner is self-adjusting.
Its on a spring loaded tensioner. Usually a wrench or socket extension(square) will be able to let you turn the tensioner to release the tension on the belt
How to
Pull on the belt and you can see how the tensioner moves. Put a wrench on the bolt.
You cannot adjust the belt tension on a 2000 dodge grand caravan. This vehicle is equipped with an automatic tensioner. If tensioner is frozen or will not hold the belt tight, it must be replaced.
If you are referring to the tensioner pulley's nut size, it is usually a metric 15mm nut.
The fan is electric, not belt driven. The serpentine belt is has a spring loaded tensioner. If the belt is loose, the tensioner has failed.
Done automatically by belt tensioner