Thread: 327 PCV valve

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Hi all. I am new to this club.I run a 327 in my 38 chevy truck. It has 9:1 comp, a semi radical cam (Chet herbert c-4) torker manifold, Holley 650,and 194 heads.I plan to get some better 2.02 Aluminum heads for it soon. For now, my first question is do I really need a PCV valve and not just an oil breather?I seem to be pulling oil up through the PCV valve, which ends up mixing in the fuel making the engine smoke.I was told that running without a PCV valve runs the risk of blowing gaskets, which makes sense. If it makes any further difference, these heads hav dual spring valves, which did not allow the use of the umbrella seals. I suspect I might be getting some oil running down the valve guides and allowing oil in the fuel mix as well. What do the pros think? Thanks!

Hey Dutch, I just took apart a 327 and it was packed with double springs and had some umbrella seals in it. The exhaust seals were rigid and the intake felt like rubber. As far as the PCV valve yes do it , its cheap insurance. Specially if your venturing over 400hp

I agree. Run the PVC. If you do not have a baffle under the PVC opening in the valve cover you should fabricate one. On the older blocks some rodders plumb the PVC valve to the crank case draft tube opening.