[s-cars] Temp guage/thermostat/MFTS Issues

[Sean Douglas]

Douglas;

Sounds like the thermostat is sticking open slightly. The coolant
temperature should be between 87-90 celcius.

If you replace the t-stat here is a tip - check to make sure it opens by
immersing in hot water. Using a thermometer, measure the water temp and
increase heat so water is boiling. The t-stat should start open at 85
and be full open at 95 celcius, plus/minus.

I found out the hard way that my new t-stat was defective and would not
open - had to do the job all over again.

Sean

> -----Original Message-----
> From: s-car-list-bounces at audifans.com 
> [mailto:s-car-list-bounces at audifans.com] On Behalf Of Douglas Fifield
> Sent: Monday, November 28, 2005 1:53 PM
> To: s-car-list at audifans.com
> Subject: [s-cars] Temp guage/thermostat/MFTS Issues
> 
> 
> S-hedz,
> 
> Nice to have you all back.  Kudos to our hosts and admins.  I 
> missed the list.
> 
> OK, need help diagnosing recent behavior observed whilst 
> traveling to turkey day festivities.
> 
> Place - Minnesota.
> Ambient temps - 5 to 28 degrees plus F.
> Conditions - freeway driving, bout 70-75 mph, dry air
> Distance - approx. 150 each way.
> 
> Driving up, I noticed the temp guage registering below normal 
> (heavy hash mark to left of center).  Needle would move 
> around a bit.  Anywhere from near the farthest left (coldest) 
> mark to normal.
> 
> I engaged the HVAC channel 51 option and saw temps that hung 
> around 80 to 81 C.  They moved a little plus and minus.
> 
> As we entered Duluth, there is a long descent where both the 
> guage and the HVAC indicators dropped.  The HVAC went as low 
> as 74 deg. C as we went down the hill.
> 
> While in Duluth for two days, the temp guage seemed to act 
> normally, though warm up was kind of slow.
> 
> Driving home on the freeway, the analog guage acted as on the 
> trip up - needle wandering between the cold setting and the 
> normal setting.  HVAC read about 80-81.
> 
> On the few occasions I have driven around the Twin Cities 
> after arriving home, the analog guage has read dead normal.
> 
> So, what's up?  The thermostat is about 3 years old.  Any suggestions?
> 
> --
> Douglas in MN
> 95.5 Audi S//6 Avant
> 73 BMW R60/5 mit Toaster Tank 
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