[s-cars] Not exactly S-car-related, but very Audi...

[Sean Douglas]

When I replaced my t-stat on my 90q20v, the temperature was quite a bit
below 90C which I attribute to an aftermarket t-stat. Before that, it was
rock solid on 90C. I plan to replace it with an OEM one.

Sean 

> -----Original Message-----
> From: s-car-list-bounces at audifans.com 
> [mailto:s-car-list-bounces at audifans.com] On Behalf Of Eric Phillips
> Sent: December 17, 2008 11:34 AM
> To: s-car-list at audifans.com
> Subject: [s-cars] Not exactly S-car-related, but very Audi...
> 
> 
> Patient:  1991 90q20V Sedan, hereafter called "Lago".
> 
> Problem:  Coolant heats slowly in comparison to S-car and wife's 2.8L
> V6 Audi motor, but does finally get to temp.  BUT, gauge 
> reading is dependent upon driving conditions - on the 
> highway, the gauge barely comes over the thin mark before the 
> fat mark that is generally considered "operating temperature" 
> by any Audi owner.  Sometimes it hangs out below that thin 
> mark.  In town, the gauge hangs out between that thin mark 
> and the fat (normal temp) mark.
> 
> My first thought was a stuck open t-stat.  Replaced it with a 
> good (tested in a pan of water on the stove) 87-degree 
> t-stat, and guess what?
> 
> Same behavior.  Lago is sick, and I don't know the cure.
> 
> I surely have done SOMETHING wrong.  But what?  I seek the 
> wisdom of other 5-cyl, 20V DIY greasemonkeys...
> 
> Eric
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