thx for the reply greendragon, I see some catch cans around that have 2 lines going to top of catch can and a clear hose along side of it so you can tell how much oil it is collecting. I was wondering if you need some type of small pcv attached to it. like the older chevs had on top of the valve covers?

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2003 bmw x5 3.0i ,219000km build date 2003-08-18