Re: Cooland pressure question...

[<trinitygadget@alltel.net>]

A higher pressure cap should, in theory, permit better heat exchange.  This is 
because (as you noted) the boiling point is raised, meaning heat is being 
exchanged between the solid coolant passage to the liquid coolant phase.  This 
is a more efficient heat exhange process than from a solid to gaseous (boiling) 
phase.  Although you may not notice a "boilover" with the 7 psi cap, that does 
not mean you don't have localized boiling on portions of the coolant passages 
that are hampering heat exchange.

Rick O.
72 TR6