crankcase ventilation

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  • E30godz
    E30 Mastermind
    • Oct 2003
    • 1524

    #1

    crankcase ventilation

    Does a boosted M20 have a problem with crankcase ventilation when boosted?? I know you are supposed to remove the line running from the valve cover to the manifold and place in pre-turbo, so it still has a vaccum source...but does that take care of it?
  • jbob
    Member
    • Oct 2003
    • 74

    #2
    pretty much...altho u may want to consider putting in a catch-can so you won't be coating the intake turbine, plumbing, intercooler with oil.
    m10 engine build photogallery

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    • Brian 89 325i
      E30 Fanatic
      • Oct 2003
      • 1450

      #3
      How do you make a catch? Im interested in this, since in STILL toying with the turbo thing.

      Brian

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      • jbob
        Member
        • Oct 2003
        • 74

        #4
        here's a slightly involved catchcan setup: http://srt4.thebatanesislands.com/my...an_060203.html

        really all u need is some long enough hose, a filter to fit over that hose, and a container to collect the oil.

        or u could always make a custom bong... hehehe, 'what's that bubbling noise' :D

        but IMO, u only need the crankcase vent to be routed to the intake for emissions.....u could vent any piston ring blowby & oil vapors to the atmosphere (just be sure to put in a filter & catchcan or else ur engine bay will get a nice coat of oil)
        m10 engine build photogallery

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