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Old 09-13-2017, 06:25 AM   #8
BillLee/Chandler, TX
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Join Date: May 2010
Location: The sticks of east Texas
Posts: 474
Default Re: How does water temperature gauge work?

I'm still unclear on how the temperature gauge works.

The gauge is not electrically operated since there is no electrical connection.

Is the sensor/tube/gauge full of fluid?

If that is the case, I suspect I had a coil boil and drop hot oil onto the sensor tube right at the back of the engine. (This being the source of the "fluid" on the cylinder head and ignition cable.) The gauge saw that very hot oil on the tube and it showed up on the temperature reading.

I'll check more closely today. This is part of a larger problem that I am working on.
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