M20B25 engine overhaul

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  • ieatmango
    Banned
    • Jul 2010
    • 67

    #16
    looks good, but why is the head full of carbon did he not hot tank it?

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    • AbsorbantNut
      Non faccio funzionare questa merda
      • Jun 2010
      • 2491

      #17
      Looks good

      suscribed


      '73 2002 m20 turbo [sold] '87 rat rod 325is [couch modded] '91 vert [daily] '88 325is [spec build v1] '84 325 [spec build v2] '99 323i vert [sold]

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      • Manolo.E30M3
        Noobie
        • Jul 2010
        • 30

        #18
        Small update:

        [quote="FLEX"]

        ... now waiting for the flywheel to be delivered back, then put the rest back together, place the engine back, fill 'er up and start it up ..




        [/quote="FLEX"]

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        • Manolo.E30M3
          Noobie
          • Jul 2010
          • 30

          #19
          I spoke to Alex (Flex) two days ago. He said i can probably come and pick my ride up sometime next week.

          Originally posted by ieatmango
          looks good, but why is the head full of carbon did he not hot tank it?
          Carbon? How do you mean?
          EDIT: Just asked him ...
          If by carbon you mean the gold/copper color, he said it depends on the cleaning method or cleaning material that is used. If other material is used it can be alu of color.
          Yes it was hot tanked.
          Last edited by Manolo.E30M3; 08-12-2010, 01:25 PM.

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          • ieatmango
            Banned
            • Jul 2010
            • 67

            #20
            no i mean all the black carbon in the combustion chambers in the head

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            • ieatmango
              Banned
              • Jul 2010
              • 67

              #21
              in fact if he had hot tanked it the valvetrain would be shiny or at least more aluminum in color than oil soaked

              Comment

              • ttrousdell
                E30 Mastermind
                • Nov 2009
                • 1770

                #22
                very nice...looks like mine

                The Build:
                http://www.r3vlimited.com/board/showthread.php?t=191125

                Comment

                • payney8
                  E30 Modder
                  • Jun 2007
                  • 899

                  #23
                  Originally posted by ieatmango
                  in fact if he had hot tanked it the valvetrain would be shiny or at least more aluminum in color than oil soaked
                  Depends on condition of the hot tank/ chemical in use.

                  Comment

                  • ieatmango
                    Banned
                    • Jul 2010
                    • 67

                    #24
                    Originally posted by payney8
                    Depends on condition of the hot tank/ chemical in use.


                    to date i've had 177 heads hot tanked (various engines 14 of which were m20 heads) in 3 states @ 19 machine shops and never ever have i seen the outside of the head shiny while the combustion chambers and topside of the head are oil soaked copper. i would guess if anything he used brake clean or gunk engine degreaser and some sandpaper or the powerball or something. hottank FTW

                    Comment

                    • Active16Bits
                      Advanced Member
                      • Feb 2010
                      • 132

                      #25
                      I'd be very upset if I received a head from the machine shop like that. Of course I'm more about looks. ;D

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