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Old 12-25-2019, 10:55 AM   #4
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Join Date: Jun 2010
Location: San Antonio, Texas
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Default Re: Pressurize a cooling system

The caps on the radiator would need some work to get the required seal for pressurization since they aren't designed for it. Skip Haney sells a pressure valve that can be added to the overflow tube to get it to pressure up but his valve is only made for near 3 PSI of pressure due to the strength of the original radiator cores. That would be all they could safely take but it would raise the boiling point a bit more.

Skips's valves are really made for the V8 radiators but they would likely work on a Model A too if the radiator cap could be sealed well enough to hold 3 PSI. An old original radiator could have weak points in the core tubes or tanks after 80 or 90 years of abuse so whether it would hold or not is anyones guess.

Last edited by rotorwrench; 12-25-2019 at 11:02 AM.
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