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Old July 22nd 05, 10:06 PM
TeGGeR®
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"R. P." > wrote in news:Q4-dnY6g25vj0XzfRVn-
:

> "TeGGeR®" > wrote:


>> Modern rad caps don't even hold pressure at all /until/ the fluid
>> begins to
>> boil, at which point pressure builds rapidly and the cap seals,
>> quelling
>> the boiling.

>
> Hm, that's interesting and prompts me to ask a relevant question, too.
> From what you are saying, it should be very rare that the radiotor fan
> should kick in after stopping the engine because according to the specs
> that fan should only come up if its sensor detects the coolant to be at
> 223 F,




The cooling fan will come on when the coolant temperature is between 191
and 197F. The thermostat is supposed to open at 194. Once it opens, the
temperature in the block falls rapidly.



> if I recall correctly. But I noticed that my car's fan kicks in
> pretty regularly after I pull into my garage and stop the engine, even
> if it was not an especially hot day or hard driving.




The cooling fan will ALSO come on after shutdown if the OIL temperature is
above 226F. At least in the US. Canadian cars may or may not have such a
feature, depending.


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TeGGeR®

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