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FlatheadTed · 09-06-2015, 05:32 PM

It could be a cylinder leak ,but also If you have high flow pumps or even 4 blade stock ones and the Radiator is partly blocked you will get a rise in Temperature with increased speed with no back valve it will force water out ,at higher speeds the motor needs more cooling ,running a shroud will make a poor Radiator more efficient. I would add a valve or header tank to try out ,and get a TK test, CO2 in the water ,If you have a electric fan it can block air flow .Ted

09-06-2015, 05:32 PM	#5
FlatheadTed Senior Member Join Date: May 2010 Location: Auckland Posts: 4,705	Re: Foaming/cavitating coolant in my 34 It could be a cylinder leak ,but also If you have high flow pumps or even 4 blade stock ones and the Radiator is partly blocked you will get a rise in Temperature with increased speed with no back valve it will force water out ,at higher speeds the motor needs more cooling ,running a shroud will make a poor Radiator more efficient. I would add a valve or header tank to try out ,and get a TK test, CO2 in the water ,If you have a electric fan it can block air flow .Ted __________________ http://www.flatheadted.com Flathead Ted brake Floaters , Last edited by FlatheadTed; 09-13-2015 at 10:00 PM.