'91 100 After Run Fan

[Huw Powell]

Same engine, different intake manifold setup.

On 8/30/2010 2:27 PM, John Gourley wrote:
> Here in the U.S. at least, the 91 100 has the NF engine  (just sold mine)
>
> John Gourley
>
>
>
> On Mon, Aug 30, 2010 at 10:41 AM, Ed Kellock<ekellock at gmail.com>  wrote:
>
>> I have a CGT with the NG motor as I believe is in you 91 100, or very
>> nearly
>> so.  Even when I did a track event with the car, I had to jumper the
>> afterrun fan manually.  The CGT engine compartment is a little tighter than
>> in teh type 44 chassis so I wouldn't expect the afterrun to run on its own
>> very often at all.  The only thing that I can see as a downside to your
>> choice to jumper it to run every time is premature failure of the fan
>> motor.
>>
>>
>> Ed
>>
>>
>>
>> -----Original Message-----
>> From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com]
>> On
>> Behalf Of Steve Buchholz
>> Sent: Sunday, August 29, 2010 8:10 PM
>> To: audifans list
>> Subject: Re: '91 100 After Run Fan
>>
>>
>> By jumpering the temp switch you have verified that the afterrun system is
>> working.  You have a temp switch that is more conservative than the one
>> Audi
>> chose to use.  You have a non-turbo engine, which should have less need to
>> keep things cool after shut down than a turbo motor.
>>
>> My recommendation would be to hook the switch back up and call it good.
>> Perhaps some day when you shut down during  a tour of Death Valley in the
>> summertime you can make proper use of the afterrun system.
>>
>> Steven Buchholz (mobile)
>>
>> ----- Reply message -----
>> From: wadd-wadd at usa.net
>> Date: Sun, Aug 29, 2010 6:47 pm
>> Subject: '91 100 After Run Fan
>> To: "Tony Lum"<tlum at flash.net>
>> Cc:<quattro at audifans.com>
>>
>>
>> I have the 85 degree after run fan switch too.
>>
>> Here is what I did: I simply connected the two wires together. This way the
>> fan comes on every time after I shut off the car and turns off once the
>> timer in the relay kicks in.
>>
>> Any adverse effects of this modification? Alternatively, is there a lower
>> temperature after run switch available?
>>
>>
>>
>> ------ Original Message ------
>> Received: Sun, 29 Aug 2010 11:53:57 AM EDT
>> From: Tony Lum<tlum at flash.net>
>> To: wadd-wadd at usa.net
>> Subject: Re: '91 100 After Run Fan
>>
>>> Take a look a the switch.  If its not 85 deg C marked on it, get one.
>>> In
>> reality, I've got two cars with the same system and neither one has ever
>> really run.  Part of it I think is because of where the switch mounts.
>> Stuck up in the air on the left side of the valve cover (drivers).  The
>> older cars mounted the switch on a bracket over the right side of the
>> engine
>> right over the exhaust manifold.  Even there, with the low temperature
>> switch, I've heard run only a couple of times.
>>>
>>> Tony
>>> '83 urquattro
>>> '87.5 coupe GT
>>> '89 100 Avant
>>> '01 A4 Avant quattro 2.8
>>>
>>>
>>> --- On Sat, 8/28/10, wadd-wadd at usa.net<wadd-wadd at usa.net>  wrote:
>>>
>>> From: wadd-wadd at usa.net<wadd-wadd at usa.net>
>>> Subject: '91 100 After Run Fan
>>> To: quattro at audifans.com
>>> Date: Saturday, August 28, 2010, 10:27 PM
>>>
>>> I've never heard the fan come on after I shut off the car. When I jump
>>> the terminals of the sensor at the back of the engine block, the fan
>>> turns on. I've replaced the sensor, but the fan still does not turn on
>>> after a hard run.
>>>
>>> Any suggestions on verifying the after run fan system is operating
>> correctly?
>>>
>>>
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-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/