You don't. The serpentine belt tension is automatically maintained by the tensioner pulley, which is an idler pulley located on the passenger side of the system and looks like it doesn't drive anything. If the belt tension is incorrect, the tensioner pulley must be replaced.
If the question meant 'how to release tension from the belt' (for removal, etc.), this is done by applying the correct size socket wrench to the tensioner pulley's center nut and rocking the pulley away from the belt.
Done automatically by belt tensioner
you dont, it has a spring loaded tensioner
You don't. If it has stretched too much for the tensioner pulley to handle, you need a new belt. Or, if the tensioner pulley is not applying correct tension, the tensioner pulley must be replaced.
You don't. The pulley is pretensioned by the manufacturer. If the belt tension is incorrect, the pulley must be replaced.
88.50 in belt
It typically costs between $100 and $150 to replace the serpentine belt on a Dodge Dakota. The belt costs around $30 with the rest being labor.
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.
Its 15mm on my '97
The automatic transmission in a 2003 Dodge Dakota does not have bands.
You dont adjust the tension on a serpentine belt, Dodge uses a spring loaded tensioner located just below the alternator, If your belt is loose it is either worn, the wrong size belt or your tensioner has frozen and not moving. If it is a brand new belt I would suggest making sure the correct one was given to you from the auto parts store. If the belt has been on the vehicle for an extended period of time I would suggest replacing it.
Serpentine belts have a pulley that is spring loaded. Tension is set automatically when the belt is installed.
It is not adjustable.