If you notice that your garage door is not moving smoothly or is acting up, it's important to take a closer look at your garage door torsion spring. If you notice that the garage door has been forced open too often, and that the springs on the door are starting to pull apart, then it may be time to have the springs replaced. Click here to read more about garage door torsion spring repair.
The first thing you should do if you notice that your garage door torsion spring is bent is to take a flashlight and shine it directly on the spring in order to see the color. The truth is, you can fix your garage door torsion spring, provided that the right steps are taken and all safety regulations are followed.
After carefully inspecting the springs, be sure to remove them from the hinges and disconnect the cable from the springs using pliers. If there are any broken sections of the springs, you'll need to take these apart with a pair of wire cutters. You should also remove the nuts and bolts that are holding the spring together.
Once you have removed the garage door torsion spring from the hinges, you should check to make sure that everything is tightly connected. If you find any loose connection points, then they should be checked and tightened, but don't tighten the screws too much. If you discover any of these loose connections, you will need to replace the torsion spring. You can use a screwdriver to do this, but it's a good idea to use an exacto knife or pair of tweezers so that you can see exactly how the screws to attach the spring to the hinges. Get more details about garage door torsion spring on this page.
Once the screws are securely tightened, remove the garage door torsion spring and place it somewhere safe. You should then clean the area where it used to be and ensure that it is completely dry before reinstalling it. Make certain to note the instructions and precautions for reinstalling the torsion spring, such as placing the garage door in the upright position and lubricating all moving parts.
When reinstalling the garage door torsion spring, always place the screws on top of each other instead of side to side. This will allow the springs to be placed at the same level.
To get a detailed overview of this topic, see here https://en.wikipedia.org/wiki/Garage_door_opener.