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DonA · 07-31-2011, 12:43 PM

Thanks wga, makes doing what I've done for 40 years worth the effort..

Jim, cap pressure ratings differ by engine. If your still running the flathead would suggest 7-10 psi, later 6's and 8's would suggest 12-14 psi. Be sure to use a "sealed system" cap where the center button on the underside of the cap snaps shut. You can pull on it to see what I'm talking about. It opens to allow coolant to return to the radiator after cool-down under a vauum.

07-31-2011, 12:43 PM	#3
DonA Junior Member Join Date: Jul 2011 Location: Los Angeles Posts: 2	Re: Replacement Radiator from US Radiator? Thanks wga, makes doing what I've done for 40 years worth the effort.. Jim, cap pressure ratings differ by engine. If your still running the flathead would suggest 7-10 psi, later 6's and 8's would suggest 12-14 psi. Be sure to use a "sealed system" cap where the center button on the underside of the cap snaps shut. You can pull on it to see what I'm talking about. It opens to allow coolant to return to the radiator after cool-down under a vauum.