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Thread: Differences between early and late m42 blocks?

  1. #1
    Join Date
    Sep 2007
    Location
    Houston, Tx
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    1,978
    My Cars
    '78 320i

    Differences between early and late m42 blocks?

    I'm in the middle of a rebuild in my late m42, from a 95 e36 318i.

    I noticed one of the main bearing caps is questionable. It looks completely different from the rest. I am contemplating collecting an m42 from an e30 since it's available for cheap.

    Will the early block mate up to the late head and timing case? Will items like the knock sensors mate to the block as well?

    I am not sure if I can post this to the models respective forums so I posted it here.

  2. #2
    Join Date
    Jan 2016
    Location
    Ca
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    6,981
    My Cars
    2001 525it
    I was looking around on reloem & the production date split seems to be up to 9/92. then from 9/92 to the end of production, but I don't know the actual difference.

  3. #3
    Join Date
    Sep 2007
    Location
    Houston, Tx
    Posts
    1,978
    My Cars
    '78 320i
    This isnt so much the cap. If what I think is wrong truly is, I'd need a new cap, crank and block. I'd have a block and pistons from an e30 and a head, timing case, etc from an e36.

    The part number for the blocks is different so I'm not sure

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