1969 Custom/10 clean up

[68Gold/white]

Originally Posted by Steve-W

I have breathers on either valve cover, so can I just close that pipe?

You can block that pipe, but you DO need to have a PCV valve, in some shape or form. THe PCV valve pulls the vapors out of the crank case and burns them in the combustion process. It IS a needed thing. Without a PCv system, oil life is very short, and the oil becomes acrid, attacking bearing metals, ruining engines.
You need one breather and a PCV valve somewhere in the crank case. THe breather allows fresh air into the crankcase, the PCV pulls that air through the crank case along with the crappy vapors produced inside the engine, and burns them in the combustion process...