Had a scary thought and my google-fu didn't turn up anything useful...
Right now I'm replacing the brake master cylinder, and of course the front/rear brake lines have to be removed. Conventional wisdom says to bleed all of the lines after putting in the new master, but that means pulling air from the master all the way out to the wheels. IE, the only place with air right now is an inch or so of tubing right at the master cylinder, so why pull those bubbles down every single brake line...
Sooo... why not just vacuum that air out through the master cylinder cap? I rigged up an old cap to hook up a hand vac pump, and with the new master on the bench it does pull fluid up through the lines under vacuum, meaning I shouldn't be fighting any valves.
Any thoughts on this?
Right now I'm replacing the brake master cylinder, and of course the front/rear brake lines have to be removed. Conventional wisdom says to bleed all of the lines after putting in the new master, but that means pulling air from the master all the way out to the wheels. IE, the only place with air right now is an inch or so of tubing right at the master cylinder, so why pull those bubbles down every single brake line...
Sooo... why not just vacuum that air out through the master cylinder cap? I rigged up an old cap to hook up a hand vac pump, and with the new master on the bench it does pull fluid up through the lines under vacuum, meaning I shouldn't be fighting any valves.
Any thoughts on this?
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