If it rattles freely its good. Right or wrong? And.....what makes them go bad?
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Your crankcase shouldn't be under a vacuum if the breather is working as it should. Your PCV valve is a flow metered check valve. You should be able to suck air through it (normal flow path), but not blow air back the opposite direction. The check valve should move freely.
Joel
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Merkava = wrong.
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Merkava = wrong.
I'am confused, please explain what one should feel if the valve is working properly.
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Merkava = wrong.
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At idle, remove the oil fill cap. Sucking? If so, you missed an o-ring on your PCV valve.
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A more sophisticated test, but not any better, is too see if the PCV will hold a business card at idle.
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Yep, some parts just need to be OEM.
Here is my PCV test.
Throw PCV into trash barrel. If it jumps out and reinstalls itself, its good. If it stays in the barrel, buy a new one!
This test has never failed me.