<VV> Thermostats

[BobHelt at aol.com]

Everybody needs to read my test article on thermostats in my  book, CORVAIR 
SECRETS.
Regards,
Bob Helt
 
 
In a message dated 7/31/2012 8:02:43 P.M. US Mountain Standard Time,  
hmlinc at sbcglobal.net writes:

The  "fail"position is open.
Later, JR

----- Original Message  ----- 
From: Jim Simpson 
To: J R Read 
Cc:  Virtual Vairs 
Sent: Tuesday, July 31, 2012 9:50 PM
Subject: Re: <VV> Thermostats


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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