Water pump stealth failure?

[David Kase]

Interesting info, the temp laser gun...

I am glad you found your culprit.

Dave Kase



Jim Jordan wrote:

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>>-----Original Message-----
>>From: Jim Jordan [mailto:j8k3sp00n at gmail.com] 
>>Sent: Thursday, September 28, 2006 7:09 PM
>>To: quattro at audifans.com
>>Subject: Water pump stealth failure?
>>
>>Hi,
>>
>>I still have indicated overheating on my 5KT.  I've replaced 
>>virtually everything in the cooling system except the water 
>>pump.  It was replaced about 20K miles ago along with the TB.  
>>I suspect that the garage that was supposed to replace it 
>>didn't or used a junk one.  The one that was in there prior to 
>>that "work" was a lifetime warrantied Graf which doesn't have 
>>a good rep in some quarters.
>>
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>--------snip-------------
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>Hi,
>
>My use of stealth had to do with the fact that I had a hard time determining
>if the water pump worked.  I'm told that the usual failure mode is for the
>impeller, especially plastic ones, to come free of the driving shaft and
>fail to rotate.  Someone suggested clear water hoses to watch it.  Good
>idea.  I went to a radiator shop wrench and he used a laser temp gun to
>determine that the cooling system was working just fine;  it was the gauge.
>I "fixed" the gauge, sort of, by grounding the voltage stabilizer to get a
>correct 10V reference for the temp and gas gauge.  I hope the designer of
>the flexible circuit that was on the back of the instrument clusters such as
>mine is having a very uncomfortable retirement.
>
>Cheers!
>
>Jim Jordan
>
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