1987 vs 1990 m20b25

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  • Varinn
    Mod Crazy
    • Apr 2010
    • 780

    #1

    1987 vs 1990 m20b25

    Just bought a 1990 325i with a snapped timing belt, head is completely destroyed and I'm thinking of just dropping in my rebuilt early style m20b25. What will I have to change on the motor to put it into the late model car? I'm thinking water pump and hoses but is their anything else? Bracket changes etc that I should be aware of?
    1990 332i, 4 door
    2008 KTM 990 Superduke
    2018 Golf R, 6spd manual (Pending delivery)
    2017 Mazda CX-5 GT
    2007 Z4M Coupe - Sold to very nice people
  • MR 325
    Moderator
    • Oct 2003
    • 37825

    #2
    Only the cooling system parts as you mentioned. Just use the harness from the 1990.
    BimmerHeads
    Classic BMW Specialists
    Santa Clarita, CA

    www.BimmerHeads.com

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    • SickE30
      Mod Crazy
      • Oct 2003
      • 769

      #3
      I have a full 87is manual harness if you dont feel like hacking your's apart.

      Comment

      • Chaz
        E30 Addict
        • Jul 2011
        • 432

        #4
        Say I want to drop a manual 89 m20 into an 87 auto, it is roughly the same thing except using the 87 coolant stuff?

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        • TG Goose
          Wrencher
          • Jul 2011
          • 234

          #5
          Varinn, I've got a new water pump for you. It doesnt have the output to the passenger side overflow tank. I also have the proper heater hose with driver side overflow T. Hit me up on BCB
          ______________________________________
          1984 LSB 318i - Sold
          1986 325i - Motor Swapped Track Car Project
          1995 318ti - Sold
          1999 540iA - Daily Driver

          Comment

          • jlevie
            R3V OG
            • Nov 2006
            • 13530

            #6
            Originally posted by Chaz
            Say I want to drop a manual 89 m20 into an 87 auto, it is roughly the same thing except using the 87 coolant stuff?
            Yes, provided that you use the 87 engine harness.
            The car makes it possible, but the driver makes it happen.
            Jim Levie, Huntsville, AL

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