Not Ranked
OEM PCV systems not only have a PCV valve to suck pollution products OUT of the crank case but also have a filtered inlet breather to introduce clean air INTO the crank case. Most of the OEM inlet filters are plumbed into the air cleaner outside the diameter of the air filter element and have those coarse filters that look like furnace filter material and a rubber hose attaching it to a valve cover. This hose is plumbed into one valve cover while the exit (PCV Vlave) is plumbed into the opposite side valve cover. The idea is to NOT create a vacuum situation inside the crank case. For those of us who do not use an OEM stock air cleaner (read that, ALL Cobra owners) we use either an oil filler cap with a breather built in or a separate breather in one valve cover and the PCV valve in the other cover. That's why the rubber grommets for the valve cover openings come in sets of two, one for a PCV valve and the other for a breather.
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Political correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."
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