M20 with G240/M42 transmission?

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  • SiGmA_X
    Wrencher
    • Mar 2006
    • 287

    #1

    M20 with G240/M42 transmission?

    I am about to embark on the simple task of swapping an M20B25 into my girlfriends 91 318, but have one question. Will the G240 bolt up to the M20, and which clutch/flywheel/starter will I need to run? Can I simply use the G240/M42's original fly/starter/clutch/TOB, or will I need something different? I ask because I'd like to do it as cheap as possible, and not buying a new transmission achieves that.

    Thanks.
    :wgaf:

    PNW BMW Crew ///
    '93 325iS
    '99 528iT
  • shEck3lls0
    E30 Enthusiast
    • Jan 2011
    • 1154

    #2
    looking to do the same thing.... anyone have an answer.
    sigpic

    1989 Alpine 325is 2dr m50 swapped
    Build Thread:
    Current ongoing build. Check it out!
    1991 318is 4dr rallycross
    Rallycross Build Thread.
    1991 Alpine 318is coupe - sold

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    • SpecM
      R3V Elite
      • Oct 2005
      • 4531

      #3
      the trans will mate to the motor for sure

      but I'm not sure about the clutch combo

      you can use an m20 fly/pp/clutch on an m42/g240, so I'm sure you can use them here too
      1989 cirrisblau-metallic 325i

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      • EN318isPDX
        R3V Elite
        • Oct 2007
        • 4373

        #4
        Originally posted by SpecM
        the trans will mate to the motor for sure

        but I'm not sure about the clutch combo

        you can use an m20 fly/pp/clutch on an m42/g240, so I'm sure you can use them here too
        with e21 TOB

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        • MR 325
          Moderator
          • Oct 2003
          • 37827

          #5
          Driveshaft fitment in the real question at hand.

          Personally I'd use the 260, not like they're hard to find.
          BimmerHeads
          Classic BMW Specialists
          Santa Clarita, CA

          www.BimmerHeads.com

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