Clutch Pedal

Mark R speedracer.mark at
Wed Jun 21 21:54:51 EDT 2006

No, low pressure vacuum.  The safest method, IMHO.  Several years ago, there
were several TSBs from various manufacturers warning against pressure
bleeding.  Of course, a lot of older brake fluid reservoirs are just
press-fit in place, with no mechanical fastening.  Under pressure, they can
easily "pop" right off.  Anyhow, I started using a Vacula DrainMan back then
and haven't thought about going back.  Pressure bleeders are generally a
little faster, but the more pressure, the greater the risk of damage.  Just
saying what I use and why,  With caution, no reason on a modern Audi why you
can't use a pressure bleeder.

I did once work on a race car which surprisingly had a hydraulic clutch
setup.  Through the structural/suspension tubing, I could get a socket with
a LONG extension on the bleeder screw to the slave, but no way was I getting
a hand in there, let alone a wrench.  Long story short, pressure was the way
to go and I just let it bleed into a pan under the car.  I normally use the
DrainMan, however.

Link to what I use:

Mark Rosenkrantz

On 6/21/06, Brett Dikeman <quattro at> wrote:
> On Jun 21, 2006, at 7:20 PM, Mark R wrote:
> > I vaccuum bleed everything.  A bit safer (since you're not pushing
> > fluid in
> > the opposite direction), but reverse bleeding also works.  As a
> > general
> > rule, "pump method" bleeding just doesn't work for clutch systems.
> >
> Uh, don't you mean you pressure bleed the clutch?
> I've generally pressure bled it to clear out the line from the
> reservoir, and then do a mixture of "push the clutch in then have
> someone open the valve" and "open the valve and then push the clutch
> in" to clear out both cylinders.  I then finish with the pressure
> bleeder to get rid of any air.
> Brett
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