Ccv - how it works and does it need replacement

[Marcin22]

Hey! I have a problem with my bmw e46 320d. Its leaking oil everywhere, and i was wondering if all of this could be caused by a bad ccv valve. But im not sure how it works as well... some people say ita there to relieve the pressure inside the crankcase caused by the blowby gasses during combustion process; however everybody keeps saying that to test the ccv valve you can open the engine oil cap and see if there is high sucting - this would indicate a faulty ccv. But i thought jf the ccv would be faulty there would be more pressure inside the crankcase. Please help me understand how it works please. Thank you

[Pelican Parts]

Hello and welcome to the forum! Take a look at the link below with info on the CCV and replacing it if needed. Please let us know if you have any questions!

http://www.pelicanparts.com/BMW/tech...eplacement.htm