Quote:
Originally Posted by Dead Parrot
If the only use for that hole will be as an oil fill hole and it will have a solid oil fill cap/plug when not adding oil, then remove the baffle.
If is is going to be a dual use air breather - oil fill hole, then keep the baffle. The reason the OEM air breather filter is in the air cleaner is under some operating conditions, there is enough blowby that air comes out of the breather. With the OEM setup, that air gets sucked back into the motor and burned. Without the baffle, you could wind up with a lot of oil on the top of your nice valve cover.
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thanks for the info, but it raises questions that I don't understand, maybe you could help.
I get that there is POSITIVE crankcase pressure that is being vented and regulated with the PCV, but why doesn't having basically an open, filtered port, the breather, destroy the point of the PCV valve. Isn't there the same pressure under each valve cover?