[s-cars] overheating dilemma -- the saga continues

Joshua Van tol josh at spiny.com
Sat Feb 25 08:21:32 EST 2006

Exactly my thought. Not everyone knows how to check a radiator, and  
unless you do this test it's easy to be fooled.

On Feb 25, 2006, at 1:42 AM, djdawson2 at aol.com wrote:

> I would check for good flow accross the radiator.  The easiest way  
> to do this is to jump the electric fan so that it is running full  
> tilt (this is done after the car is starting to overheat).  Once  
> the fan has provided a few minutes of strong airflow, feel the  
> radiator.  If the whole thing is hot, you have good flow, but some  
> other issue is causing your problem.  If one side of the radiator  
> is cool, but the other side is hot, you have a flow problem.  I  
> would narrow that down first.
> Dave
> -----Original Message-----
> From: Tony Guttmann <T.Guttmann at ms.unimelb.edu.au>
> To: s-car-list at audifans.com
> Sent: Sat, 25 Feb 2006 12:07:45 +1100
> Subject: [s-cars] overheating dilemma -- the saga continues
> Thanks for all the suggestions as to possible causes of the  
> overheating
> of my daughter's Audi 80 2.6litre V6 quattro as posted last  
> weekend. As
> I kind of expected, my mechanic was aware of, and had tried to  
> rectify,
> all those possibilities.
> After somewhere between 30-40 hours of labour (which happily he  
> largely won't
> charge for), he is convinced that the fault lies inside the engine,  
> either a
> blocked water path somewhere in a head or the block, or possibly  
> even a cracked
> block, though there is no other evidence of the latter. Rather than  
> do an engine
> strip down, he is testing a thermostat bypass system with a  
> temperature sensor
> that will kick in when the water temperature gets above 90C or so,  
> and turn on
> the
> electric fans. Any insights, or good ideas as to how to deal with this
> situation?
> To add to our woes, the increased pressure in the system has  
> damaged the core of
> the heater, which involves 6-7 hours labour puling the dash apart  
> to get to the
> heater
> core! Fortunately it's summer here, so that task can be delayed!
> TIA as usual.
> Tony Guttmann
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