Originally Posted By: chrome
Originally Posted By: heyu
Empty the master cylinder with turkey baster and refill with brand new fluid ,Depressing the brake pedal ( stop and go ) circulates the old fluid through the lines , so after replacing with new fluid a few times the lines have new fluid in them also all the way to the bleeders
Brake fluid doesn't circulate in the lines. Every time the brake pedal is depressed, a small quantity of fluid is displaced in the lines all the way to the calipers which moves the piston. When the pedal is released, the same amount of fluid is displaced back into the master cylinder.
Even if accounting for the slow painful process of diffusion, having new fluid in the master cylinder only will never result in new fluid in the calipers. The brakes need to be bled to get new fluid everywhere in the system.
Brake fluid DOES purge back through the lines ,I have done it in the past 30 years in cars,,,I would not post a message if it was not true ,