Bleeding Brake master cylinder

[sdyck]

I just wanted to confirm the process for bleeding the master cylinder while on the car.  The inly instructions I've found seem to indicate you can attach a tube from the bleed screw on the side of the master to the related brake fluid resevoir and simply pump the brake pedal until bubbles are gone. No need to open and close the bleed screw as you pump the brake pedal as you wood when bleeding the calipers and drums.  Is that correct or do you need to open and close the bleed screw with each pump of the pedal.

Thanks,

Steve

[Zed Head]

That is correct, you're just pushing the air out and if the end of the tube is in the fluid no air should get sucked back in.  Bubbles that don't make it all the way out could get sucked back though.  So clear tube is advised so that you can see the bubbles.  Another consideration is to have the front end of the car lifted so that the bubbles will be up by the bleed port.  Be the bubble.

[sdyck]

Ok, great thanks. Hadn't thought about lifting the front.