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@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
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