See below Use a 1/2 drive on the tensioner to release belt tension. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

is there a spring that i have to worry about when removing the arm that holds the tensioner

You don't remove the arm- you move the tensioner

right the tensioner is connected to the arm i have to take the arm off first right

Pull the tensioner to one side-this will pull the tensioner pulley away from the serpentine belt, allowing the belt to have slack, and then the belt is slipped off of one of those pulleys. Release the pressure slowly, remove the tool. Then the serpentine belt is removed all the way.

The Idler tensioner pulley bracket, can only be moved in one direction, to take pressure off of the serpentine belt. The direction opposite of it putting pressure on the serpentine belt.