2000 A6 2.7T overheating

Grant Lenahan glenahan at vfemail.net
Thu Jun 5 04:57:51 PDT 2008

Temp sensor is a common failure, but then, so is the T-stat.

Sounds like a t-stat. You can test temp with an ifrared gun to see if  
the thing is really overheating or not

On Jun 5, 2008, at 2:38 AM, kf21857 at comcast.net wrote:

> I was on the freeway this afternoon when my 2000 A6 2.7T began  
> overheating rather abruptly.  I pulled off and let it cool for a  
> few minutes until the temp gauge dropped to a reasonable level,  
> then made it to my destination, which wasn't far.  I had to stop  
> several times for the trip back home.  The coolant level was down a  
> couple of quarts but not extremely low.  No visible leaks and the  
> coolant level isn't dropping.  The cooling fan is running on low  
> speed but the engine compartment doesn't really feel that hot.  The  
> car has been running fine even on hot days so something failed  
> suddenly.  Bad temp sensor?  Stuck thermostat?  Internal failure in  
> the water pump?  I am thinking of temporarily replacing one of the  
> coolant temp sensors with a mechanical temp gauge before I start  
> tearing things apart.  Any other suggestions?
> thanks,
> Dave
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