odd hiss, clutch master issues
Huw Powell
audi at humanspeakers.com
Mon Jun 9 16:48:45 EDT 2003
The story so far... patient is an 87.5 "special ed" coupe. Needed
tranny replacement due to PO's error in clutch slave removal.
Did that the other night with Nate, installing a new release bearing and
clutch slave at the same time. Didn't really bleed it right away, so of
course the clutch did not work yet.
A few days later, bled it fairly well with my horrible homemade pressure
bleeder, and got "some" pedal - if jabbed fast and released, the
pressure would overcome the over-center spring and return the pedal. If
held down for any length of time or pressed slowly, it would stay down.
SO I figured it couldn't hurt much to throw in a spare old master
cylinder from parts car I have.
After installing that one and bleeding it the same way, the pedal would
consistently return, so I took a short test drive. The clutch would
only disengage at the very bottom of pedal travel, but worked for a bit.
managed to upshift a few times, turn into a driveway and stop, back
up, back into 1st and 200 yards back home - but at the end of the test,
the pedal no longer released the clutch.
Now when I press the pedal, once I get past the over center half way
point, the pedal drops almost on its own, and I hear an odd "hiss" from
the general area of the master. Anyone btheardt? I don't mind throwing
in a new master if this just means I trashed an almost dead master. I
promise I will even reinforce the firewall a bit!
Just curious if anyone has more than a theory, has actually heard this
before. It's too messy under the hood to see any leaks of any kind,
though I will do some more observing with another set of feet on the
pedal, soon.
Thanks!
--
Huw Powell
http://www.humanspeakers.com/audi
http://www.humanthoughts.org/
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