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7000 radiator cap psi
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cmalcom20 View Drop Down
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Joined: 26 Jun 2024
Location: Iowa
Points: 18 		Post Options Post Options   Thanks (0) Thanks(0)   Quote cmalcom20 Quote  Post ReplyReply Direct Link To This Post Topic: 7000 radiator cap psi
    Posted: 07 Jun 2025 at 3:32pm
Putting a new radiator in and figured I’d get a new cap to go with it. Currently has a 7psi cap on it, I thought they were 4psi systems? Does it make that much of a difference?
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 21542 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 07 Jun 2025 at 7:53pm
12 psi from the factory.
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Phil48ACWC View Drop Down
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Joined: 17 Jan 2013
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Points: 298 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Phil48ACWC Quote  Post ReplyReply Direct Link To This Post Posted: 1 hour 36 minutes ago at 6:48am
Pressure Caps make this much difference:

A 50/50 mix of water and antifreeze has a boiling point of around 223°F (106°C) at atmospheric pressure (0 PSI). However, this boiling point increases as the radiator cap pressure increases. For every 1 PSI of pressure, the boiling point increases by approximately 3°F. 
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