now that I installed a rebuilt Master cylinder ,the bleeding begins. It seems when I pump the brake I hear a bubble or two come up into the reservoir.\ So, is this normal? will bubbling stop when all the air is evacuated? the pedal is still quite low. BTW, I was able to get that bleeder screw out with the help of Vise Grips. and luckily I had a spare caliper to bulb snatch one from./
Another brake question
Jun 06, 2009
4 Replies
Normal for all bubbles to rise and if there is no air getting into the master then the bubbles will stop.
Are you getting help bleeding the system? A clear tube going into a clear container allows you to watch any bubbles coming out of the system. A lot of tiny bubbles that never stop could indicate a defective component.
When you pump the pedal, with all bleeders closed, does the pedal get higher? If so you still may have air in the system. If not then look for adjustment issues or swelling hoses or even leaking brake lines.
JMHO
why, thanks Dave, I'll check out those issues. Did I mention this is is a '71 bus? Power servo for the front discs and drums out back. Do I have to have the engine running to pump or bleed them?
SINCE YOU DON'T HAVE ABS THERE SHOULD BE NO PROBLEM EITHER WAY!!! No you probably don't need to have the engine running, but sometimes I have done that in the past to give more power to the pedal press on some vehicles.
I d>
LOL, your Master's voice here... hehe
You don't need to have the engine running. The brake servo only gives you more pedal power, but since you will have a bleeder open, there's no need for much pedal power to begin with.
Now I have to go to a bar to listen to my wife sing. The drinks are free so I'll be ok :D
Jan
dave AKA vwdoc1 wrote:
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