2012 Honda Civic 176k kms. Automatic transmission. Bought from a small used car dealership.
Hey Scotty. My sister and I love your channel and content. I want to swap the master cylinder in my 2012 Honda Civic. But I'm worried about getting air in my ABS module.(I've seen in the comments, one of your viewers ran into this problem by attempting your method) I hear it can be quite costly to remove air from the module. I don't quite understand what you're doing when you're bleeding the master cylinder. Is it that....any trapped air in the master cylinder will escape through the gap between the master cylinder and brake lines, but the brake fluid will still be pushed through?(the brake fluid now being void of any air) I would REALLY love to attempt this myself. But don't want to cause myself even more of a headache, by screwing up my brakes even worse. How can I 100% avoid getting air in the ABS?
Do you mean when he has the master cylinder mounted on the booster and is doing the bench bleed on the car?
You thread the lines into the MC until they're only lightly secured in there and then you push the pedal to the floor, slowly. Air and eventually fluid will get pushed out of the master cylinder and both will come out of the threads, as long as they're loose enough. You'll be able to tell when you've bled all the air out of the MC, as a good amount of fluid will be coming out with each pedal stroke. After you've done it at least 6-7 times, keep the pressure fully on the pedal and have a buddy tighten the lines fully into the MC. You should be good to go.
The problem with the ABS systems in modern cars is that they usually require special procedures using a bi-directional dealer-level scan tool to properly bleed the brakes.
