[DeTomaso] question for all you rocket scientists

[Paul Memont]

I agree that the hoses and such are indeed flexible and give some, but 
with pressure building while engine heat rises these parts hold the 
pressure otherwise they burst and a boil over results.  Doesn't the 
spring determine the pressure setting?  I would agree that a huge change 
in outside pressure might have an effect on the caps inside pressure and 
thus the boiling point.

Am I loosing it?

Thanks for your patience,

Paul



Stephen Waybright wrote:
> Isn't the pressure rating of the cap relative to the outside ambient
> pressure? You essentially have ambient pressure outside the face of cap
> valve, plus the spring which provides the force to oppose internal
> pressure difference up to the caps PSI rating.
>
>
> --- arado7 at sbcglobal.net wrote:
>
>   
>> Subject: Re: question for all you rocket scientists
>>
>>
>>     
>>> Unless I just don't understand, with a radiator cap on the car the
>>>       
>> amount 
>>     
>>> of oxygen in the air would not matter to the temp in the radiator. 
>>>       
>> The 
>>     
>>> boiling point would be higher depending on the rating of the cap
>>>       
>> and not 
>>     
>>> the outside air.
>>>
>>> Guide me if I'm wrong.
>>>
>>> Paul
>>>       
>> The cooling system of a car is not a rigid sealed system. There are
>> rubber 
>> hoses and flexible sheet metal elements in radiator and heating coil.
>>
>> Therefore I believe atmospheric pressure would influence boiling
>> point. 
>> Gary  B9472283 
>>     
>
>
>