Originally posted by racerguy
I must ask, how can you run with a non-pressurized cap?
with a non preasurized cooling system, most all old cars like my '51 Chevy had them and I'm running stock running gear. instead of having the spring that moves up and down, and opens up the blow off, theres just like a dome in the center where the spring would be. I thought I had a broken cap when I first pulled it but, later found out it spoda be like that but, with a gasket.