[V8] Cooling/ radiator question

[Steve Kramer]

Kneale ,  I will check.  The aux. fan does go on - when I turn on the ac

 Also I have looked under the hood when it's idling and it hasn't gone off
when the car was running - except when I've switched on the ac.


Where again is this box - is this the box located behind the driver's side
headlamp assembly and before the big rectangular resevoir?


Steve Kramer


> From: Kneale Brownson <knotnook at traverse.com>
> Date: Fri, 15 Mar 2002 16:00:21 -0500
> To: Steve Kramer <skramer at mac.com>, <v8 at audifans.com>, <quattro at audifans.com>
> Subject: Re: [V8] Cooling/ radiator question
> 
> Do you know whether the electric auxiliary fan also comes on when the
> coolant temperature rises, Steve?  There is an 80-amp fusible link mounted
> in a little black box on the front of the hydraulic system oil
> reservoir.  Take the cover off and be certain the link is intact.  It can
> "look" ok, but actually have failed.  They seem to fail regularly.  No
> fusible link means the electric fan never runs.
> 
> 
> At 02:18 PM 03/15/2002 -0600, Steve Kramer wrote:
> 
>> One of the nice selling points for this car over my 89 200 was the more
>> straightforward type of cooling system as opposed to the cooling system on
>> the 200.
>> 
>> Having a radiator fan cooling the radiator all the time is nice on the V8.
>> However, I am getting the feeling that this engine is running hot.  As to
>> not repeat the problems I had with my other car I would like to get your
>> opinions.  I either think the water pump is dying or there are some sensors
>> that aren't doing their jobs.
>> 
>> Here's the diagnosis.
>> 
>> Car runs good. I drive on the highway to get to work. It takes me about 30
>> minutes
>> 
>> As temperature increases - oil starts to thin down.  I find that when I get
>> to work my oil pressure/ bar gauge is around 1  Oil temp is at 60 and
>> coolant temp is just above middle line at idle.  This is all happening on a
>> 50 degree day.
>> 
>> A typical day I am driving this car at 80mph on the highway for 20 of the 30
>> minutes.  Driving at 80 the bar pressure is at 5 and the coolant temp is at
>> the middle line.
>> 
>> The multi function alert system says everything is fine.  No temp warning or
>> anything.  I have replaced the upper hose because it had developed a small
>> leak.  The other hoses are in good/ fair shape but no leaks.  There is no
>> loss in liquid at the expansion tank after I drive.
>> 
>> Does the V8 typically run hot?  The radiator is cooling the antifreeze
>> properly because the radiator feels cool to the touch.  But the engine,
>> hoses and coolant are very hot when I turn off the car.  I'm a little
>> concerned.  If not the pump are there cooling sensors that are not feeding
>> the proper amount of coolant through the engine.  Where are the different
>> sensors?
>> 
>> 
>> Thanks
>> 
>> 
>> Steve Kramer
>> 90V8 q
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