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M21 Feasibility Question

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    M21 Feasibility Question

    I recently inherited an M21 diesel motor. I'm curious about something that I have not been able to determine from numerous searches.

    Would it be possible to fit a 200 or 731 head to the M21 block with custom pistons to convert this motor to gasoline operation?

    I am not suggesting it would be a smart thing to do versus other options or that I would pursue this but was just curious if it is technically feasible.

    #2
    I wouldn't know, but from my general knowledge, conversions don't work out well. Look at the Gm diesels that were converted from gasoline power in the late 70s. They were shit.

    Personally, I think it would be a fool's errand.
    Estoguy
    1986 BMW 325, Alpenweiss ~ "Elsa"

    Need a photographer, come visit my site: http://estoguy.wix.com/unique-perspectives

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      #3
      the motor is far more valuable than a regular m20. Just sell it for $500 and buy a regular m20b25 for $250.
      AWD > RWD

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        #4
        Originally posted by Kershaw View Post
        the motor is far more valuable than a regular m20. Just sell it for $500 and buy a regular m20b25 for $250.


        If your selling an m21 for 500. I'll fucking take it haha.


        No a gas head cannot be put on a diesel engine


        1989 325is l 1984 euro 320i l 1970 2002 Racecar
        1991 318i 4dr slick top


        Euro spec 320i/Alpina B6 3.5 project(the never ending saga)
        Vintage race car revival (2002 content)
        Mtech 2 turbo restoration
        Brilliantrot slick top "build"

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          #5
          Google up pictures of the heads and blocks and look if oil and coolant passages even line up. They do not.
          My transaction feedback on r3vlimited :):Clickety click

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            #6
            Originally posted by ThatOneEuroE30 View Post
            If your selling an m21 for 500. I'll fucking take it haha.


            No a gas head cannot be put on a diesel engine
            Seconds!

            I kinda wanna pop an M21 into one of the Rovers....
            1974.5 Jensen Healey : 2003 330i/5

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