re RE: 4kq clicking noise after oil change

["Smith, Kirby A" <kirby.a.smith@lmco.com>]

"Robinson, Michael/SJC" <mrobinso@ch2m.com> wrote:

good chance it is your vacum pump.
i removed the push pin in mine many miles ago and have had no problems.

#######
While I cannot speak to the details of a 4000 vacuum pump, the one on the 90
can be fixed by removing excess oil above the diaphram.  BTDT.  By pulling
the pin, one loses a braking safety margin Audi built into the car.

Kirby A. Smith   New Hampshire USA
1988 90q Titanium gray, 182 kmi
1988 90q Stone gray, 187 kmi 
1988 90q Stone gray, 180 kmi - parts car
1995 S6 Pearl effect, 82 kmi