I believe the black stuff is the rubber seals deteriorating. Mine was like
that for a while, then I lost pressure entirely and had to rebuild the
master cylinder.
Just a thought!
Doug
'69
----- Original Message -----
From: "Robert M. Lang" <lang@isis.mit.edu>
To: "Navarrette, Vance" <vance.navarrette@intel.com>
Cc: <6pack@autox.team.net>
Sent: Friday, May 14, 2004 11:53 AM
Subject: RE: Trash in the master cylinder
> Hi,
>
> While not very "comforting" I can say that I see this black crud in both
> my TR6's. I wind up using my mighty-vac to suck all the fluid out of the
> MC reservoir and cleaning the crap up with absorbent towels.
>
> I then fill and bleed the entire system. I do this every couple of years
> _max_. I have to do it because many times the folks that do "tech" at
> autocrosses want to fail me because of the goo. Of course, most of these
> folks drive cars with ABS where the crud actually matters! :-)
>
> I think that the black stuff is corrosion from the MC bore, but I could be
> wrong there because I know I have a sleeved MC on one of the cars... I
> just can't recall which one! But I get the black stuff in both TR6's. At
> any rate, it's "normal" to see the crud in my experience (30 plus years
> with TR6's).
>
> Note: you might try seeing if the cruft sticks to a magnet. This might
> point you toward the source...
>
> rml
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