Thread: PCV valve with breatherless valve covers?

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Don't mess around with this. Vent one valve cover and PCV the other side, both with a baffle as cited above. Remember you need a breather AND suction (PCV) to properly control crankcase pressures.

Keep an eye on your PCV uptake. In some cases you may need more baffling to control burning oil through your manifold or spewing it out of your breather.

Regards, Kitz

So what happens if you were to simply vent both valve covers with baffled grommets?

Originally Posted by Jeepzilla

So what happens if you were to simply vent both valve covers with baffled grommets?

That would work fine if one of them were hooked to manifold vacuum or a syphon device (like the old road draft tubes) to induce air flow.

i use a moon breather and pcv in the manifold. i ran a clear tube to keep track of oil. this is about 6k miles and still no leaks from mains. i dont like holes either