Presumably, the pressure limitation is based on the design of the original copper radiator, right? I am temporarily using an aluminum after market radiator that came with cap rated at about 14 psi. This should allow a pressure around 5 to 10 psi, right? Still trying to figure out the pressure gauge that I can attach to the line for the duration of testingthat wont leak air and be sensitive to low pressures.
Bob
