How important is the gasket when replacing brake master cylinder?

[james accordino]

I think it's only for dirt and mostly moisture.  That
area "should" be dry.  I know it's very hard to tell
the difference sometimes, but if it's Pento., the
front seal of the brake booster is bad, brake fluid
and the rear shaft seal of the master is shot.

Jim Accordino

--- Kneale Brownson <knotnook at traverse.com> wrote:
> --
> There's an O-ring in there, but I don't know what it
> seals against.  There
> should not be any brake fluid coming out the back of
> the master
> cylinder.  Did you change the gaskets between the
> reservoir and the master
> cylinder?  I could see fluid leaking past old, hard
> gaskets at that
> location and running down the bottom of the MC to
> where it bolts onto the
> booster assembly.  Was this a NEW master cylinder?
>
>
> At 11:44 AM 11/21/2001 -0500, Bill Rowe wrote:
>
> >Replaced the brake mc on my 87 5ktq a few weeks ago
> and in my haste
> >failed to replace the gasket.  I'm losing fluid and
> it appears to be
> >coming from where the mc bolts to the brake servo.
> Will a bad or no
> >gasket cause a leak or do I have faulty mc?
> Thanx.
> --
>


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