1963 Radiator cap pressure ??

[3lawson]

I have a 63 p/u with a 230 six banger bored 40 over all new internals. Does anyone know what pressure Radiator cap I need ??
Thanks in advance....ML:+

 

[dvalentine]

Should be the same as factory. Trying to remember.... 12 - 18 lbs ??

 

[bk65]

The 63 factory manual lists the pressure as 7psi. I know the early trucks used lower pressure caps because the radiators couldn't take the higher pressure. Not sure if the replacement radiators can take the higher pressure or not.

 

[3lawson]

Thanks for the reply folks, I have put a new 7 # on it...ML