Water Temperature Gauge

[James A]

I added an aftermarket water temperature gauge under the dash of my Model A. I mean the type with a probe stud which I installed in a hole in the water inlet connection on the side of the block. It looks good but it's not working. Why not, I wonder? Could it be that it's made for a pressurized system and the Model A is non pressurized? That's the only reason I could think of.