Smoke out of the valve cover breather?

[Stomis]

Your not doing the engine any good running it with no PCV valve..it will eventually sludge up the oil and allow condensation to build up under the intake and it might even encourage oil leakage at the seals and gaskets..
Also a pcv valve is a controlled vacuum leak,that affects air/fuel mixtures,and can lead to overly rich running conditions...they rob no power ,so there is little to be gained by not having one,and much to lose..

I never realized that till I saw some old small blocks (pre-62) that had a road draft tube instead of a pcv valve,and they had a small 1/16" or so hole made into the base of the 2GC rochester carbs to compensate for the lack of a positive crankcase ventilation valve..

Its not like that by my doing. Just havent gotten around to hooking it up yet. PCV frees up power by creating a vacuum in the bottom end that causes less turbulence on the rotating assembly too

 

[ryoken]

I know the purpose of the system Bob.. was just saying it's very feasible to not run a pcv system...

 

[diesel4me]

I understand that..engines never had such a thing as a pcv valve for decades--no argument there,sure they will run without one..its just they will last longer with one is what I'm trying to say...not having one wont blow up an engine ,but it wont last as long without one either ..