Farm Equipment - 7000 radiator cap psi

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7000 radiator cap psi

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=207014
Printed Date: 26 Jul 2025 at 3:08pm
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Topic: 7000 radiator cap psi

Posted By: cmalcom20
Subject: 7000 radiator cap psi
Date 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?

Replies:

Posted By: DrAllis
Date Posted: 07 Jun 2025 at 7:53pm

12 psi from the factory.

Posted By: Phil48ACWC
Date Posted: 10 Jun 2025 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.