[urq] Water Wetter Observations

[John Koenig]

I would think that air in the system or a near-funky thermostat would be a
more likely cause than the Water Wetter, which should be a constant once its
in there. My understanding is that air around the sender can cause it to
read higher than when it's surrounded by coolant.
John


----- Original Message -----
From: Brandon Rogers <brogers at terrix.com>
To: Urq List <urq at audifans.com>
Sent: Tuesday, September 14, 2004 4:36 PM
Subject: [urq] Water Wetter Observations


Hey guys-
Full Park City UPG report to follow later, but here's a something to think
about/debate WRT Water Wetter.

I poured a bottle of Water Wetter into my system last Thursday evening- the
night before the big trip to Park City, in anticipation of sustained high
revs through the desert-like country.  This was against my motto of no new
variables immediately before a big event....

To make room in the coolant reservoir I had to remove some of the apprx.
50/50 mixture.  I did disconnect the small line from the top of the rad to
the reservoir in an attempt to let some drain, but very little came out and
I reconnected.  Some air may have entered the system at this time.

Fast forward to Friday morning.  After having driven for about half an hour
on the highway-(60-70 mph-some uphills certainly) I looked at my temps and
the gauge showed about 250F!  I pulled right over and popped the hood.  I
had never seen temps this high.  When I popped the hood the engine
compartment was not very hot- at least not like you'd expect if the engine
were about to boil over.  I loosened the overflow cap to let some air out.
I turned the car on again and the gauge went to only 215-220F - the high
side of normal for this car.  So we got going.  About 15 minutes later the
temp gauge went towards the 250F mark again and I decided to drive through
it and within a couple minutes it was back to ~210F - where it stayed for
hours.  Intermittenty through out the weekend, the temp gauge would indicate
close to 245F-250F for a few minutes - then once I saw that when it went to
a normal reading, it dropped like a rock - like from 250F to 215F in less
than 10 seconds.  After a few episodes I think I found the pattern- it would
show high on flat sections or uphills after some somewhat sustained low
load - ie downhill.  But not always.  A few times I turned the heat on and
it did not seem super hot - a sign that the water temps weren't really that
high- it was a gauge thing.  So I'm thinking either A) I have a sticking
thermostat B) the Water Wetter is affecting the sender's reading or C) the
Water Wetter is making the thermostat react slower to the water temp change.

Thoughts?

Brandon
'84 ur 20V w/ stock urq rad/aux rad


_______________________________________________
Audifans urq mailing list
Send posts to: mailto:urq at audifans.com
Manage your list connection: http://www.audifans.com/mailman/listinfo/urq
Have an urq question?  Check the Audifans Knowledgebase!
http://www.audi-quattro.org/cgi-bin/twiki/view/Audi/UrQuattro
Have an urq answer? ... Please help others by adding to the KB ... all
contributions welcome!