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The package that the springs came in says maximum safe stretch is 42 inches, which isn't much more than the non-stretch length of 25 inches.
Also asked, how do I know what size garage door spring I need?
Easy as 1, 2, 3, 4.
- Look at the end of the spring to determine the wind direction.
- Measure the length, in inches, of ten or twenty coil of the spring that needs to be replaced.
- For torsion springs, measure the inside diameter of the 1/16” of an inch.
- Measure the overall length of the spring to the nearest quarter inch.
Additionally, how do you stretch a garage door spring?
Part 3 Adjusting Torsion Springs
- Close the garage door. Unplug the opener if you have an automatic garage door.
- Secure the door.
- Locate the winding cone.
- Loosen the set screws.
- Prepare to adjust the tension.
- Adjust the tension.
- Stretch the spring.
- Tighten the set screws.
Garage Door Balance Adjustment with Extension Springs Open the garage door as wide as possible before you reach the stop bolt of the garage opener. Next, you need to take clamps to hold the door in position on each side of the door on the track so that there is no tension on the door from the springs.