On Sun, 21 Apr 2013 19:08:23 -0700 (PDT), bob haller >
wrote:

>On Apr 21, 9:50*pm, "
> wrote:
>> On Apr 21, 6:11*pm, Tony Hwang > wrote:
>>
>>
>>
>>
>>
>> > Ashton Crusher wrote:
>> > > I was thinking of putting a higher pressure cap on one of my cars to
>> > > increase the factor of safety against boiling. *Looking thru the web
>> > > for info on the likelihood of changing from 7 psi to 13 psi causing
>> > > leaks I found little on that issue but did find a couple references to
>> > > the pressures created by the water pump. *One site boasts of a 19 PSI,
>> > > $25 cap to get you thru your "hard driving".
>> > >http://www.mishimoto.com/mishimoto-h...tor-cap-13-bar....
>> > > Thought I'd see if anyone else has heard of this. *The claim was that
>> > > the water pump could create over 30 PSI of pressure. *Since that is
>> > > double the normal operating pressure of most modern cars I find it
>> > > hard to believe. *If the system was at full 15 psi of pressure while
>> > > the car is idling and then your floored it and ran it up to near
>> > > redline * and created another 30psi of additional pump pressure, or
>> > > even 10 psi of additioingnal pressure downstream at the radiator cap, you
>> > > would immediately cause the system to have to vent to the overflow to
>> > > relieve this higher pressure. * I've never seen a car vent due to me
>> > > revving the engine up while I'm working on it. Thoughts?????
>>
>> > Hi.
>> > There is a over flow bottle for coolant/anti-freeze. Ever
>> > cleaned/flushed your rad. and maintain proper level of
>> > coolant/anti-freeze in your rad.? If the car is old, messing with cap
>> > can spring
>> > a leak.- Hide quoted text -
>>
>> > - Show quoted text -
>>
>> AMEN!
>
>DONT EVEN THINK ABOUT THIS WITH A CHEVY VENTURE! their engine the 6
>cyc one tends to develop super expensive head gasket leaks as is......
>
>some things are best left alone
I'd never overpressure anything with a plastic tank rad. Actually I
wouldn't overpressure ANY system.