Sent: Friday, March 04, 2005 12:38 AM
Subject: Re: O v e r h e a t i n g
> So the cooling questions come with March, hey?
>
> The instant going from hot to real hot tells me
> pressure leaves the system. The pressurized cooling
> system has a higher boiling point by virtue of that
> compression.
But would this really have an effect on the engine? The water may be NOT
boiling at one temp and boiling at the next temp, but it is still just one
or two degrees different, the fact it is boiling doesn't mean it is a great
deal hotter than a non-boiling solution. Or am I missing your point?
>
> Once you get to a certain amount of pressure, if
> there is no integrity, boiling occurs with permission
> to go with the laws of nature. The boiling point of
> plain water is what - 212F? For every pound of pressure,
> that number increases.
>
> It can be 225F and not boil, but drop pressure and
> the water has to boil, bigtime. Can Paul or some
> engineer-type give us examples? Maybe put this on
> a website?
>
> How the boiling point is altered by a 40-50%
> coolant additive and water wetter. How many degrees
> this harder-to boil mixture can withstand if compressed?
>
> How bout it? We could even add a list of causes that
> mean inefficiency, like lean mixture, loose fan belt (yes!),
> bad gasket, less water flow around #4 if the htr valve is shut.
> Rotten WP impeller, stuck thermostat, cramped hose,
> filthy radiator outside or in. Let us count the ways!!!
>
> The fan points the "right way", even when mounted backwards.
> If the curvature built into each blade isn't acting to scoop
> the air rather than push at it, it won't move much air.
It will move the same amount of air no matter which way it's pointing, but
if the fan is mounted behind the radiator it should "pull" air through the
radiator or if it's in front it should "blow" it back through the radiator
to be efficient and not act against the movement of the car.
Dan
>
> I shudda bean a engin-ear.
>
> David McCartney / Captain Rapture.
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