The spring in the rpesure cap will have the same force regardless of
altitude, so the pressure inside the colloing system will not be
effected.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf
Of Pensioner
Sent: Friday, June 06, 2003 8:28 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Cooling System performance at altitude

If one has a 15psi cap will the coolant boil at a lower temperature at
7500
feet than at sea level.  Same problem as a weight controlled pressure
cooker
and temperature degradation with altitude.  Both are "closed" systems.
Any
ideas?

p