Yes a master cylinder can be defective but when i have suffered it it
was manifest by a lowsy pedal feel. How many laps around the corners
of the car have you made? I do 2 or three laps preferably with a
helper pumping the master cylinder.

"Wray McDonnell" > wrote:

>When the brake pedal on this car started going to the floor, I looked for
>signs of leaking brake fluid and leaks on any of the brake lines or wheel
>cylinders. I found none and the brake fluid reservoir which sits atop the
>master cylinder was at it's full mark. I suspected that the master cylinder
>was shot.
>
>So I put a new master cylinder in. However, when I went to bleed each wheel
>(starting at the farthest away), I found that I could not get the air
>bubbles to stop coming from the right rear cylinder. The other three are
>clear with no air upon bleeding. The rear brakes including cylinders were
>replaced a year ago and are in good condition (dry under the rubbers).
>
>This car does not have the "equalizer" that is mentioned in some manuals.
>
>I suspect that it might be a problem with the connections of the brake lines
>to the master cylinder. However, it doesn't seem to be leaking fluid in any
>way. And I still get air bubbles from the bleeding of only the right rear
>cylinder. Could the new master cylinder be defective?
>
>So my question is: What have I done wrong here? or What could be the
>source of the air in the bleeding of the right rear cylinder?
>
>Thanks for your advice.
>Wray
>


Jim B.