[V6-12v] Car not getting up to temp in winter...thermostat not the problem

[Tom Christiansen]

You can also use a resistor:
<http://www.bentleypublishers.com/tech/vw/bentley.vw1301.testing.htm>

This page is worth looking at for general substitutes for the VW electrical 
tools as well:
<http://tech.bentleypublishers.com/thread.jspa?threadID=4799&tstart=0>

Tom

At 04:12 AM 7/6/2005, James Whitehouse wrote:

>Yeah, the other thing that's always worth checking before replacing a
>thermostat is that the multifunction sensor which feeds the dashboard temp
>gauge (not the other coolant temp sensor which only feeds the ECU) is
>working to spec. If not it can read low/high and you end up misdiagnosing a
>faulty thermostat. You can do it with a volt meter before you go to the
>trouble of doing a thermostat change. Glad it was a simple prob in the end
>though.
>
>James
>
>
>On 6/7/05 3:51 am, "Austin Franklin" <austin at darkroom.com> wrote:
>
> > Hi,
> >
> > 96 A4Q 12V, was not getting up to temp in winter, so I just put cardboard
> > over the radiator, and it worked great for the cold weather (I got 
> heat, car
> > was at temp), and removed in the warm, works great as well.  I thought it
> > was the thermostat...and given that it's major surgery, I decided to do the
> > timing belt (car has 70k miles, and is 10 years old), water pump, pulleys
> > etc. as well as the thermostat.  All went well (KTR in Ayer, MA did all 
> that
> > work for $300 and I highly recommend them, plus parts were $200 from
> > Shokan...they let me buy the parts) but the thermostat wasn't bad!
> >
> > It ended up being the expansion tank cap wasn't venting.  It's supposed to
> > rattle when you take it off and shake it (like a PCV valve) to allow
> > pressure to escape...as the pressure will keep the thermostat open...so a
> > new $8 cap fixed the problem.  I needed to do the timing belt etc. anyway,
> > but I wish I had figured out the cap in the winter.
> >
> > But, all is well now with the cooling.  On to the mirror and other minor
> > issues.
> >
> > Regards,
> >
> > Austin
> >
> >
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>
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