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Discussion Starter · #1 ·
I've search through the posts and can't seem to find one that explains how does the e36 oil ventilation valve work...

I'm aware that it's fundamental operation work on the basis of the change in pressure in the crankcase and intake which variates as the revs changes

Please help as oil is leaking through the ventilation valve on the valve cover....

I remember seeing a maze under the valve cover which acts as an oil separator

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