[A4] After-run pump, 30V
indischrot at gmail.com
Thu Jul 17 10:37:53 PDT 2008
Thanks for the reply. I know my 944's would kick on the radiator
fans any time the sensor detected a certain temperature.
My A4's fan runs on "high speed" (hair dryer sound) almost all the
time because I have the A/C on. I bet this keeps water temp lower than
it would be if I was on a death wish with "Econ."
I will investigate the wiring diagrams and see what temp sensor it
uses to kick on.
Tom Christiansen wrote:
> Don't know if this is applicable, but the late 80'ies Audi 5000
> Quattro I had a while ago had the after-run feature. As did many other
> vehicles of that vintage. I think it only ran if the fans had been on
> the highest speed. If that translates to your car, you should see the
> fans come on once you hit the 2nd fat mark at 1 o'clock on the
> If you have a Bentley manual, you should be able to figure out how the
> system is supposed to work from the wiring diagrams. There might even
> be a test procedure for testing the after-run.
> On Wed, Jul 16, 2008 at 10:48 PM, Scott Simmons <indischrot at gmail.com
> <mailto:indischrot at gmail.com>> wrote:
> Hey all,
> Verified that my car (2000 ATQ) does indeed have an after-run pump
> (and module by the vacuum reservoir). I have the 8Z6 option for "hot
> country," which appears to include a heavy-duty radiator, after-run
> pump, and heavier cooling A/C.
> Bentley seems to indicate that the pump, after MY 99, will run
> for 3
> minutes if the vehicle is driven. I'm not sure if I've ever heard
> thing run. I got the car good and hot (oil temp at "11 o'clock") and
> shut it off. No sounds from under the hood. Does it have to reach a
> certain temperature and THEN it will run for 3 minutes? The coolant
> temp always sits at "noon" (within a hair of it one way or the other
> sometimes). Heat soak temperature readings, that is: me returning to
> the car after it has sat for awhile, finds the needle barely past noon
> (almost to the next mark).
> Anyone have experience with an after-run pump? Any specs on what
> all is
> included with the 8Z6 option?
> Scott S.
> A4 mailing list
> A4 at audifans.com <mailto:A4 at audifans.com>
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