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RE: 1960 TR3 thermostat

from [Randall] [Permanent Link][Original]
To: <triumphs@autox.team.net>
Subject: RE: 1960 TR3 thermostat
From: "Randall" <tr3driver@comcast.net>
Date: Sat, 22 Oct 2005 09:17:03 -0700 
> Why would the thermostat have a problem with 10 PSI if the 10 PSI is applied
> to both sides of the thermostat?

Because the original Smiths thermostat was an aneroid type, with a bellows full
of gas that expanded when warm (and opened the thermostat).  The cooling system
pressure was not applied to the inside of the bellows, so the gas would have to
get hotter to overcome the cooling system pressure as well as the spring
pressure.

Randall


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