Vacuum Unit noisy

[Kneale Brownson]

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Common solution is to remove the actuator rod.  Seems not to cause any
problem with the vacuum-assisted power braking.  I think there's a write-up
on Brendan Barry's page:  http://www.endosquid.com/audi/aud4kfix_vacpum.htm

At 05:08 AM 09/17/2002 -0700, ANTHONY ATTARD wrote:

>Good morning everyone.
>
>I have a 1988 Audi 90Q with auxiliary vacuum unit
>noisy (this the unit that is operated by the camshaft
>and is mounted on the side of the cylinder head). It
>sounds like a tappet noise, but I know for a fact that
>it is the push rod that operates the diaphragm that is
>making the noise.
>
>Has anybody on the list ever tried to fix this
>problem??
>
>If so, how??  I understand they are very expensive to
>replace.  Thanks a bunch in advance.
>
>Tony:  1983 URQ, 86 4kCSQ, 1989 model 90Q, 1988 model 90Q.
>
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