Re: 200tq auxilliary water pump

["Fred Munro" <munrof@isys.ca>]

Hi Thomas;

    The failure you describe is common with old auxillary coolant pumps. The
plastic gets brittle with age.
    This pump circulates coolant while the after-run fan is on, decreasing
the time required to cool the engine down after you have shut off the car.
The primary purpose is protection of the turbocharger, which will eventually
cook it's seals if shut off hot. If you are running without the pump, you
should idle the car for a minimum of 40 seconds before shutting it off -
this will allow the turbo to cool off a bit.
    The pump was installed for a purpose and IMHO you should replace it.

    I have attached a post from Avi Meron describing an alternative pump he
has sourced.


* The pump is a 12Volt coolant pump and is designed to act as a water pump
for a small block Chevy,
* Electrical draw is under 10AMP and when the coolant is hot the electrical
draw is only 2 AMP, as a comparison, the draw on the rad. fan (at the lowest
speed) is between 11-13 AMP
* The pump is NOT magnetically driven, it is driven by a shaft with a high
temperature impeller (when you get the pump you get 2 spare impellers)
* Dia. of the pump is app. 2.5" and length is under 6"
* The pump section is all SS
* The flow capacity of the pump is many time over the Audi pump (designed to
replace the water pump on a small block Chevy)
* The pump will  fit very nicely in the same location of the old pump
* I wired it with a relay just to be on the safe side, did not trust the
"chintzy" OEM wires, the pump has continues 12Volt and the ground is
activated when the pump is on (OEM set-up), you have to wire it accordingly,
no big deal
* the pump runs noticeably less time than the OEM pump, probably because it
is a REAL pump not a "piss poor" (engineering terminology) excuse for a pump
* cost for the pump is about $90 and Shogun has them (they are on the net),
I will dig the phone # for who ever wants it, the company is located in
Prior lake MN 1 800 527 5665 tech line # is 612 447 6784



HTH

Fred Munro
'91 200q  275k km


----- Original Message -----
From: Thomas Barbera <tjbst39+@pitt.edu>
To: <quattro@audifans.com>
Sent: Saturday, May 29, 1999 4:52 AM
Subject: 200tq auxilliary water pump


>     The auxilliary water pump broke on my '89 200tq.  The plastic that
> makes up the outlet shattered and coolant went everywhere.  For a quick
> fix, I pulled out the pump and simply directly connected the hoses.  The
> car runs just fine without the pump, and the coolant temperature seems
> to be normal.  Is that pump even needed?  I priced one at $180, and if I
> don't need to buy it, I don't want to.  As far as I can tell, the pump
> that shattered is unrepairable.  I sure wouldn't trust epoxy.  If
> someone could tell me whether this pump was just one of Audi's paranoid
> little additions, or whether it will cause some major problems without
> it, I would greatly appreciate it.  Thanks in advance.
>
> Thomas Barbera
> '89 200tq
> '86 4kq
>
>
>