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JayChicago · 12-17-2020, 03:30 PM

I feel your frustration about draining the radiator. The aluminum radiator in my '37 has just one fitting for a pet cock, and that fitting is now used for the electric fan's temp sensor. So I have to loosen the sensor and try to modulate the flow by hand, or loosen a lower hose. Either way, can't catch all the coolant in a container. Makes a mess, on the floor and down my arm. Ugh!

Maybe the gauge sending unit is picking up heat directly from its fitting, even though it's probe is in an air pocket?

12-17-2020, 03:30 PM	#36
JayChicago Senior Member Join Date: Jan 2019 Location: Chicago Posts: 732	Re: Flathead running cold I feel your frustration about draining the radiator. The aluminum radiator in my '37 has just one fitting for a pet cock, and that fitting is now used for the electric fan's temp sensor. So I have to loosen the sensor and try to modulate the flow by hand, or loosen a lower hose. Either way, can't catch all the coolant in a container. Makes a mess, on the floor and down my arm. Ugh! Maybe the gauge sending unit is picking up heat directly from its fitting, even though it's probe is in an air pocket? Last edited by JayChicago; 12-17-2020 at 03:45 PM.