list:

reply from motorad tech department says that locking temperature for 192 F
thermostsat is 245 F. that is considerably less than boiling point of 265 F
with 50/50 coolant solution and standard 15 psig cap.

dan

On Tue, 12 Jul 2005 17:55:15 -0400, Daniel L. Katz <katzd54@YAHOO.COM>
wrote:

>list:
>
>anyone have water cooled vanagon experience with FAIL-SAFE thermoststs by
>MOTORAD?
>
>http://www.motoradusa.com/products/failsafethermo/
>
>autozone carries them; probably other suppliers as well.
>
>have used these with success in ordinary cooling systems, but the water
>cooled vanagon, as we all know, requires the thermostat to modulate the
>flow somewhat more precisely than on a standard system.
>
>another question i have about these thermostats is how far above normal
>operating temperature the permanent fail-safe feature engages; in other
>words, if relatively minor overheating causes the unit to lock open, they
>would probably now and then lock open unnecessarily, and, potentially, be a
>lot of work to maintain.
>
>dan