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Bullshark · 06-19-2020, 03:43 PM

Car runs cool with adequately filled radiator. Pretty stock car, No thermostats installed. Running down the road 40-50mph with 4:11 differential, radiator fills up and blows out overflow tube. Then the syphoning takes over. Will probably have to get a pressure radiator cap as well, not sure. I have been told that large washers or punched out thermostats installed at water pumps to slow flow may fix.it but that comes later.

06-19-2020, 03:43 PM	#4
Bullshark Junior Member Join Date: Jan 2018 Location: St. Charles, Missouri Posts: 29	Re: 1935 coupe overflow tank recommendations Car runs cool with adequately filled radiator. Pretty stock car, No thermostats installed. Running down the road 40-50mph with 4:11 differential, radiator fills up and blows out overflow tube. Then the syphoning takes over. Will probably have to get a pressure radiator cap as well, not sure. I have been told that large washers or punched out thermostats installed at water pumps to slow flow may fix.it but that comes later.