Can I watch? :o) .... Jim S.
Jim Sower wrote:
> <... Why wouldn't the pressure increase when water levels drop
and
> steam develops? ...>
> Need to work backwards on this one. If the water level drops,
one
> would deduce that it happens for a reason, and a leak comes
> immediately to mind. When the cooling system starts leaking,
the
> pressure drops off substantially quite a while before any significant
> drop water level.
I don't agree. A minor leak (pin hole) will not cause a significant
pressure drop. Sure, loosing the cap or a hose the pressure will drop.
> FIRST the pressure drops precipitously, and THEN the coolant
level
> starts to go down ... FINALLY the temps start to rise (provided the
> temp sender is submerged in what water remains).
>
> If you were to use a coolant level indicator, where would you put
it?
>
Yes, that is a tough one. Somewher in the upper part of the pump
housing. The whole idea is to get an early warning - must be able to
loose more coolant before pump stops pumping, so you can make it to
the
nearest airport without frying the engine.
> Not in the block, because Ed has established that what
coolant
> remains is relatively well distributed in the block. In the
expansion
> tank? I would suspect you'd get a lot of "false negatives".
I don't
> know where I'd put one, or how much to trust it.
>
> Just a theory .... Jim S.
>
Obviously is going to take some testing and trial and error.
Finn
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