This assumes you've checked that your rear brakes, adjusters and handbrake
mechanisms are installed correctly and are in correct adjustment:

Replace the master cylinder - I'd say it's leaking internally (i.e.. fluid
is getting past internal seals while the pistons are moving but not leaking
past the outer seals). COULD also be a booster problem, but anytime the
pedal goes to the floor the booster will "whoosh" because it's allowing
venting of air behind the diaphragm. This air has to be allowed to move,
otherwise the diaphragm would be hindered in its movement.

Coby

Valley Wagonworks
"Intimately acquainted with VW Vans since 1959"

Volkswagen Bus, Vanagon, Westfalia and Eurovan
Repair and Service Specialists

1535 Sir Francis Drake Blvd., San Anselmo, CA 94933
Voice:(415) 457-5628
Fax: (415) 457-0967
http://wagonworks.com
mailto:contact@wagonworks.com

> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM]On Behalf
> Of Alan S Gondry
> Sent: Tuesday, June 22, 1999 10:16 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: A Braking Question
>
>
> My brakes go to the floor making a whooshing sound when the pedal is
> depressed.  The sound is coming by the master cylinder or booster.  The
> brakes have been bled.  No air and no fluid loss.  What expensive part is
> broken?
>
> Alan Gondry
> '83 h2o vanagon
>
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