I forgot to add:
apart from the noise, the brakes still seem great.  very firm.

On Sun, Oct 30, 2011 at 11:42 PM, pickle vanagon <greenvanagon@gmail.com>wrote:

> I've noticed that with hard brake application, I slight hissing sound can
> be heard coming from under the dash in our 83 westy.  I fear it's the brake
> booster?
>
> You don't need to be moving to hear it.  When idling, if I push in the
> brake medium-far, I hear nothing, but pushing down *hard*, I hear the
> hiss.   It seems like the noise is on or off, and doesn't vary continuously
> with depth.
>
> There is no fluid leak....
>
> Is this a problem?  I don't usually push down the brakes hard, so I'm
> wondering if its down this for a while without me noticing.
>
> I'm afraid to ask the next one...
> do I need to remove the dash to replace the booster?
>
> Thanks!
> Wes
>