I'll be taking Ol Roy's radiator to my radiator guys this week. Since it's a zero pressure system, I want to let them know but what would be the maximum pressure that that radiator could withstand?

I use a 4 lb pressure cap. So I know that it can at least take 4 lb. I just want to let them know so they don't accidentally blow up the radiator when they test it.

These days I don't take anything for granted, or that professionals actually know how to do their own job.


They're probably aren't many zero pressure systems left these days that the shop works on.


1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)