<VV> Thermostats

[Jim Simpson]

I used to be able to watch the right (passenger) side damper door close
after shutting the engine down.  Yes, it has always definitely closed
first, but now it seems to be on the verge of never opening -- or at least
opening at a higher temperature.

Perhaps I'm over reacting; I just drove back from Sturbridge (to Maryland)
and in the ~90 temps near home, everything was hot...  I think I'll go
ahead and swap in one of the reproduction thermostats and see what happens.

Jim Simpson
Group Corvair

On Tue, Jul 31, 2012 at 9:54 PM, J R Read <hmlinc at sbcglobal.net> wrote:

> Jim,
>
> The left side opens first and closes last.  This is normal.
>
> It is probably not possible to stop the car and run to the RR fast enough
> to see that door still open.
>
> Later, JR
>
>
> ----- Original Message ----- From: "Jim Simpson" <simpsonj at verizon.net>
> To: "Virtual Vairs" <virtualvairs at corvair.org>
> Sent: Tuesday, July 31, 2012 7:10 PM
>
> Subject: <VV> Thermostats
>
>
>  Does anyone know at what temperature the stock thermostats are supposed to
>> open?  I can't find it in any of the standard references.  (One of the
>> damper doors on my Corvair doesn't seem to open properly.  It's free to
>> move, but lately even when the engine is hot, it seems to stay closed. And
>> yes, it is adjusted according to the book.)
>>
>> Supposedly the thermostats are filled with one of the isomers of butyl
>> alcohol but there are four varieties, each with a different boiling point.
>> And the fill may be a mix.  Even if I knew which one, it's still a bit
>> more
>> complex since bellows is designed to fail open and therefore is under a
>> partial vacuum when cold which would affect the boiling point.
>>
>> I've checked several reproduction thermostats and they start to expand in
>> boiling water but not fully.  By contrast, the one I removed from the car
>> -- a GM original -- doesn't show any signs of expanding in boiling water.
>>
>> Jim Simpson
>> Group Corvair
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>
>