[V8] Overheating, loss of electric fan 92 V8 4.2

[Ingo Rautenberg]

Ah, one other this you may want to look at:

Heater core may be failing.  After car has cooled off, unscrew  
expansion tank cap. Then remove overflow hose at expansion tank  
nipple and check for blockage.  If you have bits and pieces of  
plastic, remove them and pray that your heater core hasn't totally  
broken down.  Yeah, BTDT.  Replaced (unecessarily) the viscous fan  
(which was fine, but not working because that area of the radiator  
was internally blocked), radiator, expansion tank and heater core on  
one V8.  Oh, what joy!  Not! I would definitely invest in an infrared  
thermometer to check efficiency/blockage of radiator.  And if you do  
need to replace, definitely OEM.  I did a fair amount of cutting / 
trimming of the slightly cheaper replacement radiator and wouldn't  
want to spend all that extra time and aggravation again.

Ingo

On Jul 17, 2007, at 9:54 AM, MORRALEE David wrote:

> I agree QSHIP , I've have a replacement rad for my car and will put in
> shortly . The old rad is super clean and has NO signs of clogging .
>
> instrument cluster would read fine on the highway, and high around  
> town.
>
> Superdave
>
> -----Original Message-----
> From: v8-bounces at audifans.com [mailto:v8-bounces at audifans.com] On  
> Behalf
> Of QSHIPQ at aol.com
> Sent: Tuesday, July 17, 2007 9:51 AM
> To: v8q at bellsouth.net; ron_01056 at yahoo.com
> Cc: v8 at audifans.com
> Subject: Re: [V8] Overheating, loss of electric fan 92 V8 4.2
>
>
>
> After doing a couple of unnecessary radiator replacements in my wife's
> car, I decided to actually verify that there actually was a problem.
> Indeed, there was, the gauge in the instrument cluster would read fine
> on the highway, and high around town.  The IR temp gun confirmed that
> the engine was at  normal temps, and the ecu fan speed trigger was  
> dead
> nuts on.
>
> Before you change a darn thing, make sure there's a real problem.
>
> Scott Justusson
> In a message dated 7/17/2007 8:41:45 A.M. Central Daylight Time,
> v8q at bellsouth.net writes:
>
> The  prime indicaof a partially clogged radiator is that is is fine on
> the  highway, but overheats in town.
>
> Ron Wainwright wrote:
>> Not sure  if it was mentioned yet Andrew, or not sure if the t- 
>> stat is
>
>> there at  all...LOL
>>
>>  But it is a good point. But the history of  these cars says it's the
>> rad.
>>
>>   Ron
>
>
>
>
>
>
> ************************************** Get a sneak peek of the all-new
> AOL at http://discover.aol.com/memed/aolcom30tour
> _______________________________________________
> Audifans V8 mailing list
> Send posts to: mailto:V8 at audifans.com
> Manage your list connection: http://www.audifans.com/mailman/ 
> listinfo/v8
> Have an Audi V8 question?  Check the Audifans Knowledgebase!
> http://www.audifans.com/twiki/bin/view/Audi/V8
> Have a V8 answer? ... Please help others by adding to the KB ... all
> contributions welcome!
> _______________________________________________
> Audifans V8 mailing list
> Send posts to: mailto:V8 at audifans.com
> Manage your list connection: http://www.audifans.com/mailman/ 
> listinfo/v8
> Have an Audi V8 question?  Check the Audifans Knowledgebase!
> http://www.audifans.com/twiki/bin/view/Audi/V8
> Have a V8 answer? ... Please help others by adding to the KB ...  
> all contributions welcome!