UrQ after-run fan

[quk@sievers.com (Phil Payne)]

In message <199706101306.JAA00149@ns.tamsconsultants.com> afinney@tamsconsultants.com writes:

> All this prepurchase info has made me a little suspicious of
> my after-run fan. By after-run do you mean the injector fan,
> 'cause I replaced the temp switch with a much lower 90c
> switch and it comes on after a hard drive after shut down.
> Or..... is the after run a mode of the rad. fan which I don't
> have working. My fan will come on if the car is hot after
> shut-down in stage 1 mode but not all the time. This signal is
> coming from a temp sender. Is there a specified period where
> the fan should just come on say for 1 minute after
> shut-down?

I have three after-runs on the ur-quattro - the turbo water pump, the injector 
coolers and the main radiator fan.
 
The turbo water pump seems to be just a timer - it _always_ runs, even if the 
engine is only run for seconds for tuning or testing purposes. It's very quiet 
- even in a closed garage it's hard to hear. The injector cooling fan is driven 
by a thermo-switch, but the thing gets hot enough to run after about four to 
five miles. From home to the pub it never runs.  The main radiator fan only 
seems to run after a hot run on a hot day - when it does, it wakes the 
neighbours.

--
 Phil Payne
 phil@sievers.com
 Committee Member, UK Audi [ur-]quattro Owners Club