RE: afterrun thermoswitch BTDT

["Avi Meron" <avi@cosmoslink.net>]

Phil, my afterrun comes on almost every time (I have 2 5Ks).
Avi

> -----Original Message-----
> From: owner-quattro@coimbra.ans.net
> [mailto:owner-quattro@coimbra.ans.net]On Behalf Of Phil and Judy Rose
> Sent: Friday, April 24, 1998 3:20 PM
> To: hah@srv.net
> Cc: quattro@coimbra.ans.net
> Subject: RE: afterrun thermoswitch BTDT
>
>
> Henry,
>
> Just a thought: If the "test" was with the hood _up_, that may have gotten
> the system cooling off too quickly for the after-run to get switched on. I
> think the after-run may be designed to work only in pretty extreme
> heat-load situations. If so, and if the difference between 60F and 70F
> (outside temp) is significant, then having the hood open is probably gonna
> be significant as well. (damn I don't wanna have to replace my
> switch!!!) :(
>
> Phil
>
> >Phil R. sed:
> >> When I replaced the multifunction switch on my '89 100, I was
> able to get
> >> the new one in before more than 1/4 liter (or so) of coolant
> had escaped.
> >> However access to the after-run switch on the '91 200q is _so_
> limited that
> >> I'd expect to lose a _lot_ of coolant.
> >>
> >> Let us know if you manage the job without serioiusly skinning
> at least 3 or
> >> 4 knuckles. I got some painful abrasions just getting the
> connections off
> >> to do the test. :(
> >>
> >
> >Contortions definitely required. I let it cool off *almost* enough to not
> >burn
> >myself on the various warm things around there, and the
> >oil-level-checking-device tube is very much in the way.
> >
> >> BTW, on my "new" '91 200q, the after-run came on for the first
> time about
> >> 10 days ago when there was a spate of unseasonably warm
> weather (close to
> >> 70 F, wow!). I idled the engine in the driveway until the
> cooling fan came
> >> on and then shut the engine down immediately (temp gauge at 12
> o'clock.)
> >> Then I checked the mail, went inside the garage, started
> around into the
> >> house, and after what _must_ have been at least 4 or 5 minutes, the
> >> after-run came on. This was a very similar experience to what
> I encountered
> >> with my previous car--although it was during the Fall season then.
> >>
> >> So, although it may still indicate a faulty component, it's
> possible that
> >> the after-run sensor might not trigger without warm outside temps plus
> >> having several minutes to activate--when we're likely to be long gone.
> >>
> >
> >That's more like a BTDT that I asked the list for earlier, but
> was probably
> >buried in an unrelated note.
> >
> >Here's what I did yesterday coming home from work. Well, I drove home,
> >about 15
> >minutes, temp gauge is at first bold hash as usual. Ambient
> about 70F, but
> >becoming partly cloudy and cooler. Let it sit idling in the driveway,
> >(hood up)
> >trying to get fan to come on. With AC, stage one fan is always
> on, at idle
> >for
> >this temperature not enough heat generated to get stage two.
> Turn AC off, get
> >stage two (from stage zero) every five minutes for about a
> minute. Get bored,
> >leaving hood up, turn off engine and begin to play with my
> favorite driver's
> >door innards while things cool off so I can pull off the afterrun switch
> >connectors to test the pump. I mess with the door for 20 minutes
> or so before
> >connecting a particular way to reassemble the inner handle with
> that silly
> >clicking noise when lock/unlocking, don't ever hear the fan/pump come on.
> >Hood
> >is still up, of course, so I do the short-connectors-together
> test to verify
> >pump can run. It does, I put them back on, ponder a bit, then go fire off
> >note
> >to q-list.
> >
> >Perhaps the system is still functioning as intended, and I just haven't
> >got the
> >car hot enough and watched it afterwards. The cooling system does seem to
> >have
> >significant ability, so the funny thing is that running the car
> hard and then
> >shutting it down to check afterrun workings seems to border on vehicular
> >abuse
> >(if the afterrun doesn't in fact work after all).
> >
> >No luck on any such test today though, it's now under 50F and
> raining to beat
> >the band. Good quattro weather, anyway.
> >
> >Hmmm,
> >Henry Harper
> >http://www.srv.net/~hah
> >1991 200 quattro, 87k, does or does not the afterrun subsystem
> work properly,
> >that is a question for another day
> >1988 GTI 16v, 177k, only rarely do I hear the afterrun fan come
> on in this
> >car
> >(and pretty much never hear the turbo pump :)
>
>
>          **********************************************
>          *  Phil & Judy Rose     E-mail:              *
>          *                       pjrose@servtech.com  *
>          **********************************************
>
>