2000 A6 2.7T overheating

[Grant Lenahan]

Glad your problem is solved.

It may be appealing to thinks "we're better", but I for one dont make  
fun of AudiWorld - they have great resources and some very  
knowledgeable people, especially on newer models.

I go out of my way to post write-ups and tutorials there. I couldn't  
even get login info to post them here ....so its clear where the  
scale in terms of lots of tech resources will be.  In many ways  
that's good since it consolidates stuff for users.

Grant
On Jun 29, 2008, at 3:45 PM, kf21857 at comcast.net wrote:

> It turned out to be a stuck thermostat which was only opening about  
> 3mm instead of the 8mm the Bentley calls for.   Apparently the  
> coolant loss was caused by the overheating, not the other way  
> around.  I will keep an eye on the coolant level but the system is  
> holding pressure several hours after being shut down so I think  
> everything is back to normal.  I replaced the water pump, belts,  
> cam seals, etc etc while I was in there.  Everybody makes fun of  
> Audiworld, but they have some tech articles on line that go into a  
> lot more detail than the Bentley does.  I referred to both of them.
> Dave
>
>>> I understand that, but the same symptoms occurred after refilling  
>>> the
>>> expansion tank.  That is how I knew it was down 2 qt.  The system is
>>> definitely pressurizing.
>>
>> A genie didn't wave a magic wand and have such a large volume of  
>> coolant
>> magically disappear.  You have a *substantial* leak.
>>
>> Find and fix the leak, like everyone has been telling you.  You'll
>> probably find a cracked plastic piece, pinhole leak in a hose, or  
>> a loose
>> hose clamp that only starts to leak once the engine warms up and the
>> system begins to pressurize.  If you can't find a leak anywhere,  
>> you may
>> have a leaking head gasket.
>>
>> Also, I don't know if the 2.7TT engine requires a specific  
>> purging, but if
>> you were down two quarts, you could have air trapped somewhere.   
>> On the
>> older cars, the instructions were to park the car on a sharp  
>> incline and
>> run it with the cap off until the fan cycled on.  I have no idea  
>> what the
>> process is on newer cars, or even if it's necessary.  It's moot  
>> until you
>> figure out where the coolant is going, however.
>
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