thermostat

[Nathan Winters]

I've detected the smell of coolant recently and am trying to trace it down.  I'm not sure if it is the heater core or if it could be related to what is described below.  I usually notice the coolant smell if the blower isn't running.  If the blower is on I don't usually detect the smell, not sure why this happens.
If the heater control valve does fail, what are the symptoms?  Also, if it is bypassed, what actually happens?  What function does the valve perform?

I do get good heat from the vents.  Also, I've recently replaced the temp diverter flap motor b/c it was stalling in some positions.

My gauge on the cluster usually reads low coolant temp and low oil temp.



Thanks

Nathan





----- Original Message ----
From: Mike Miller <mikemilr at blackfoot.net>
To: michael <mdearing at mhtc.net>; 200q20v at audifans.com
Sent: Fri, February 8, 2008 9:34:26 PM
Subject: Re: thermostat

Is the oil temp also low?

As I recall, Audi Thermostats are 80 and 87 deg C

Like Peter suggested - heater control valve? Easy to bypass. Use a 4-5 inch long 3/4in pipe nipple (99cents at home depot) and two hose clamps. It's good to carry one anyways if (when) the heater control valve eventually fails. 

mike


----- Original Message ----- 
From: michael 
To: 200q20v at audifans.com 
Sent: Friday, February 08, 2008 9:49 AM
Subject: Re: thermostat


There has been a thread on thermostats already some time ago.
I have had a cold running car for a few Winters.  I replaced the  
thermostat a couple of times with no change.  (It was not the sensor,  
the air from the vents was cold.)
I tried it again this Winter with no change.  I purchased an after  
market 192º thermostat and it solved (?) the problem.  The only  
thermostat sold by Audi for this car must be a cooler one.
Until last night.
On a 12 mile trip, the coolant was cool.
On the return 12 mile trip after sitting for one hour, the coolant  
was normal.

What am I missing here?
- Michael


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