View single post by Jim Ketcham
 Posted: 04-30-2015 04:51 pm
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Jim Ketcham

 

Joined: 03-13-2005
Location: Salt Point, New York USA
Posts: 192
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Frank,
7 psi cap is what came from the factory with the car. I am sure since I bought the car new in 1974.
You would not want a cap with a pressure rating higher than the systems as it would not protect the system. Think of it as a fuse.

Mine has always been 7 psi and it has never blown coolant yet.