[DeTomaso] brake master cyl still bad?

boyd casey boyd411 at gmail.com
Sun Apr 18 14:32:15 EDT 2010


After numerous problems of a similar nature Chris Difani turned me on to a
"Power Bleeder" It is a half gallon or so sized jar with a pump on it.
Instead of sucking fluid through the system it forces it through under
pressure. It can be used for brakes and the clutch. It will ensure your
system has no air in it. If you still have a problem then it is in your
master cylinder. I have also found that since most of the parts now are
manufactured in China there has been a real problem with tolerances. When I
replaced my Clutch Master cylinder I actually bought two replacements ( that
were marked "made in Italy" ) They weren't you could tell by the casting
marks that they were copies. I finally had to use some of the old parts from
my original master cylinder incorporated with the "New " ones before I could
get it to work. If you have to replace your master cylinder I would strongly
recommend going with CNC which is an American company and still made in the
US. The power bleeder made by motive products is one of the best products I
have purchased in recent history. It even has a pressure gauge so you can
see that your system is holding pressure with out leaking. You can get one
through Amazon.com for a competitive price. Good luck!
Boyd

On Sun, Apr 18, 2010 at 2:11 PM, Tom Borcich <tborcich at msn.com> wrote:

>
> I've never used a vacuum bleeder...It's been a while since I bled a brake
> system, but as I remember I used a tube going into a mayonaise size bottle
> with one inch of fresh brake fluid in it. Make sure the tube is always
> submerged below the fluid. Open the bleeder on the down stroke and close on
> the up stroke, pump the pedal slowly up and down, ....make sure you keep the
> master cylinder reservoirs full as you are pumping fluid through the system
> so it doesn't draw air into the system. It will pump out the fluid in lines
> and also take the bubble and air with it. Basically all you are doing is
> pumping fluid through the system until all the air is gone.  You will need a
> few large bottles of fluid. This is a two or three person job, one on the
> pedal, one at the caliper and one filling the master cylinder. I did this on
> my McLaren which used separate master cylinders for front and rear systems,
> and used Girling calipers. It worked great.  I think it should work fine
> with a dual reservoir master cylinder. Start at the right rear, then do the
> left rear, then the right front, then the left front (farthest caliper first
> then move to the next farthest until you are done).
>
> Jim, I live in Seal Beach...I can drive over and give you a hand if you
> would like.
> Tom
>
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