A quarter turn at a time will do it.
Tighten garage door torsion spring.
Remove the winding bars and repeat the process on the other torsion spring before releasing the c clamps and testing the door.
To adjust your garage door s side mounted springs first open your door fully and secure it in place with a c clamp below the bottom roller.
It may take a few trips up the ladder but resist the urge to tighten your door too quickly this can lead to busted springs and serious injury.
This can make the other parts of the garage door last a much longer time.
I have been in construction most of my life and i personally know a few garage door installers.
I have worked on torsion springs and i must confess that it made me nervous.
How to safely adjust your garage door spring.