On Sat, 18 Jan 2003 19:56:29 -0500, Michael Brown <m_brown@COX.NET> wrote:

> I just got an 85 Vanagon.  The brakes would take 3 pumps to pump up, so I
> replaced the master cylinder.  After I replaced it, I bleed the brakes.
> Now when I push the brakes, I hear a hissing noise coming from the
> booster and still takes one pump to get a firm.  I pumped the brakes and
> held them down with the engine off, and when I turned the engine on the
> pedal depresses slightly and holds (bently test). When I turn the engine
> off, the hissing stops from the booster (holding the pedal down).  When I
> press the brake the rpms on the engine go up. I should also mention
> before I changed the cylinder and before I bleed the brakes, I did not
> notice the hissing sound.  The rotors, pads, drums, shoes, etc. are good
> and there is no break fluid leaking.  I would like to solve this
> tommorow.
>
> Does this mean the booster is bad?  Or is it a vacum leak somewhere?
> Could I have hit a vacum line or something when I changed the MC?  If it
> is a vacum leak, where/how do I go about finding it?  I have an 81 westy,
> is the booster the same as on a 85?
>
> Thanks,
>
> Mike
>
> 85 Vanagon
> 81 Westy
> 72 Westy
>
>

--
Leon