Thanks Larryguy.    ;)

I'll keep a hawk eye on pressure and would have a clamp ready to clamp
the hose going to gauge before releasing pressure at gauge. This might
help keep coolant from blasting on up into the gauge guts.

Such highly technical terms I'm using.  lol.

Neil.

On 5/21/17, Larry Alofs <lalofs@gmail.com> wrote:

> Hey Tubaguy,
>   The gauge will read the pressure of whatever is connected to it.  If
> there are no leaks in the gauge or the connections to it, the air that's in
> there will compress somewhat, but the reading will reflect the pressure of
> the coolant.  I don't think that coolant would damage the gauge if some did
> happen to get that far.   Go for it.
>    You should watch the gauge all the time that the engine is running.  If
> the temperature gets high enough the pressure may go above normal levels
> since there will be no relief as provided normally by a properly working
> cap.
>
> If you remove the rubber from an old valve stem, the brass tube inside
> gives you a fitting to attach your tester to an air compressor or a bicycle
> pump if you want to pressurize the system yourself.
>
> Have fun,
> Larry A.
>
>
> On Sun, May 21, 2017 at 3:31 PM, Neil N <musomuso@gmail.com> wrote:

>> Does the gauge read resulting air pressure only? In other words, does
>> the fluid ever contact the gauge itself?

--
Neil n

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