[s-cars] Manual Control of afterrun pump and fan

[Doug Landaeta]

Question: I thought that the after-run pump forces
the coolant in the opposite direction than when
the engine's internal water pump is running. If
the standard after-run switch is by-passed, does
the after-run pump and fan come on when the motor
may be running? This may be a problem if the 2
pumps are fighting each other.

Doug L
94 S4

> -----Original Message-----
> From: Sean Douglas [mailto:quattro20v at telus.net]
> Sent: Monday, September 06, 2004 12:10 AM
> To: 'Kevin Day'; 'Noah'
> Cc: s-car-list at audifans.com
> Subject: RE: [s-cars] Manual Control of afterrun
> pump and fan
> 
> I did something similar, but instead of a dash
> switch, I installed a
> thermo switch (034 919 369 A)that measures air
> temperature under the
> hood and is set to come on at 85 celcius. I
> mounted the switch on the
> right side of the engine, near the back just
> above the downpipe. I
> removed the wires from the stock coolant temp
> switch and ran them to the
> new switch. Now when I run my car, the after-run
> pump and fan comes on
> about 80% of the time.
> 
> Here is a picture:
> http://pictureposter.audiworld.com/52091/switch0
> 04.jpg
> 
> Sean
> 
> Sean Douglas
> 1997 Audi S6//RS2-spec
> 1990 Audi 90 quattro 20v
> 
> 
> > -----Original Message-----
> > From: s-car-list-bounces at audifans.com
> > [mailto:s-car-list-bounces at audifans.com] On
> Behalf Of Kevin Day
> > Sent: Sunday, September 05, 2004 4:40 PM
> > To: Noah
> > Cc: s-car-list at audifans.com
> > Subject: Re: [s-cars] Manual Control of
> afterrun pump and fan
> >
> >
> > On Sun, Sep 05, 2004 at 02:42:32PM -0400, Noah
> wrote:
> > > Has anyone added a switch to control these
> two things? I'd
> > like to be
> > > able
> > > to turn these two things on by hand when I
> am wanting to
> > cool the car down
> > > faster so's I can work on it sooner.
> > >
> > > Anyone btdt? of course reasons why this is a
> bad idea are also
> > > welcome.
> >
> > I did this and am pretty happy with it.  I
> partially
> > documented it here:
> http://ultrameta.home.comcast.net/swturbocool/
> >
> > In addition to allowing a manual override, it
> lights an indicator on
> > the dash when the thermoswitch closes on its
> own.  I have
> > seen it once or twice on a hot day while the
> engine was running.
> > Cost is one defroster switch and a homemade
> wiring harness.
> >
> > -Kevin
> > '94 S4
> >
> >
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