M50nv head vs M50tu head

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  • Jahman093
    Advanced Member
    • Sep 2012
    • 183
    #1

    M50nv head vs M50tu head

    So, I'm doing an m50nv swap and while cleaning up the block I noticed I crack in the head on the exhaust side on cylinder #4.
    I have a spare m50tu head that could be used.
    Other than the valve springs are there any differences between the two heads?
    I plan on using the NV cams. Would I run into any issues with those?
    Thanks in advance
    Tags: None
    • Bimmerguy91
      E30 Modder
      • Jul 2012
      • 982
      #2
      The head castings are different. M50NV head casting # is 1720840 and M50 Vanos head casting # is 1738400.

      I've got a nice rebuilt M50NV longblock with dual intake cams you could just buy and not worry with it ;) haha!

        Comment

        • Bimmerguy91
          E30 Modder
          • Jul 2012
          • 982
          #3
          NV head also has 7mm valve stems vs 6mm for all the other heads.

            Comment

            • Jahman093
              Advanced Member
              • Sep 2012
              • 183
              #4
              Would there be any power differences between using one or the other?

                Comment

                • pazi88
                  E30 Addict
                  • Sep 2015
                  • 584
                  #5
                  Originally posted by Jahman093
                  Would there be any power differences between using one or the other?
                  No.

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