Need help identifying some odds and ends on an M50 swap (air intake stuff)

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  • 540ig5
    Noobie
    • Nov 2013
    • 20

    #1

    Need help identifying some odds and ends on an M50 swap (air intake stuff)

    I got most of what goes where figured out but there's a few things i'm not sure about. Any help of what is suppose to connect here would be awesome. I have circled the "mystery" items in the pics blow. OBD1 M50 from a 1992 525i Thanks.





    Last edited by 540ig5; 05-18-2019, 07:51 AM.
  • gazellebeigem3
    No R3VLimiter
    • Jun 2005
    • 3712

    #2
    The longer end of the first mystery piece snaps into the valve cover. The other end is missing a hose (part number 11151735150), which should connect to the intake elbow circled in the last pic. The yellow or white capped line should go to the purge valve.

    Edit:

    Breather valve diagram:
    http://www.realoem.com/bmw/enUS/show...diagId=13_0189

    Crankcase vent valve diagram:
    http://www.realoem.com/bmw/enUS/show...diagId=11_4857

    Comment

    • 540ig5
      Noobie
      • Nov 2013
      • 20

      #3
      Originally posted by gazellebeigem3
      The longer end of the first mystery piece snaps into the valve cover. The other end is missing a hose (part number 11151735150), which should connect to the intake elbow circled in the last pic. The yellow or white capped line should go to the purge valve.

      Edit:

      Breather valve diagram:
      http://www.realoem.com/bmw/enUS/show...diagId=13_0189

      Crankcase vent valve diagram:
      http://www.realoem.com/bmw/enUS/show...diagId=11_4857

      Thank you so much. Makes perfect sense now.

      Follow up question. I didn't get a purge valve with the M50 that i bough. I'm putting this into a 325es. Can I just connect the e30 charcoal canister directly to the throttle body without using the purge valve or is that going to cause issues? I know this is a bit off topic so if i'm opening up a can of worms here, sorry.

      Comment

      • gazellebeigem3
        No R3VLimiter
        • Jun 2005
        • 3712

        #4
        I'm pretty sure you'll get a CEL running no purge valve. The DME likes to see it plugged in, but it has no way of knowing if its connected to anything or not.

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