The CCV regulates flow to maintain a certain level of vacuum in the crankcase while the PCV just regulates (basically 2 positions) flow according to how much vacuum(level) is in the intake manifold. Completely different. Plus the CCV also uses a cyclone to seperate the water (and oil) droplets and return them to the crankcase.
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1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)
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