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Old 12-25-2019, 12:44 PM   #6
Jim Brierley
Senior Member
Join Date: Jun 2010
Location: Temecula, CA
Posts: 3,132
Default Re: Pressurize a cooling system

To answer your question, yes, but other hings need to be done, and considered. As rotorwrench stated, a new neck needs to be soldered to the top tank, so the cap would seal. If using the stock Model A water pump, it may not hold the pressure, and would leak. A hot-rod overflow tank needs to be installed, it can attach to the tabs that hold the shell on. You could also just install an overflow tank to the stock radiator, that would catch all the water, and suck it back in as the engine cools. I suspect you are not using the stock pump, or maybe even the original engine?
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