[V6-12v] Thermostat lifespan

Austin Franklin austin.franklin at charter.net
Mon Jun 19 08:13:18 EDT 2006

Hi Tom,

I did mine last year at 60k, and it was fine...just 10 years old, so I
replaced the timing belt, water pump and thermostat.  It's a bit of a PITA
job just for a thermostat though!

BUT...I wouldn't rule out that there is some other problem.  Check the
expansion tank cap...see if it shakes (after you take it off).  If there is
excessive pressure in the system, it will hold the thermostat open and cause
the exact same problem.



> -----Original Message-----
> From: v6-12v-bounces at audifans.com [mailto:v6-12v-bounces at audifans.com]On
> Behalf Of Tom Christiansen
> Sent: Monday, June 19, 2006 12:06 AM
> To: v6-12v at audifans.com
> Subject: [V6-12v] Thermostat lifespan
> Folks,
> It obviously figures that immediately after I replace my heater core,
> the thermostat is now stuck open prompting me to spend even more hard
> earned cash on that liquid Audi gold coolant. Dammit!!
> Anyway. It got me thinking: What's the average lifespan of a
> thermostat. Mine has a couple of years (2-3) and 30k miles on it. Is
> it normal for a thermostat to fail this early? I'd think it was
> designed to last at least 60k so it could be replaced along with the
> timing belt.
> At least it's stuck open. Not shut...
> Tom
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