Last night I tore down my S52 and

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  • M-technik-3
    I waste 90% of my day here and all I got was this stupid title
    • Oct 2003
    • 18946
    #1

    Last night I tore down my S52 and

    I know that all US market got the same head with exception of the M50b25NV and even that head can be modified to accept a vanos. But I was rather surprised to pull the head and see a 2.5 marking on the engine for a 3.2 engine.

    Anyway I need a 24V head someone have one presently have one for sale?
    https://www.facebook.com/BentOverRacing
    Tags: None
    • agent
      Vice Grand Pubaa
      • Mar 2010
      • 7960
      #2
      Check with RobertK.
      Originally posted by kronus
      would be in depending on tip slant and tube size

        Comment

        • DesertBMW
          E30 Enthusiast
          • Aug 2011
          • 1011
          #3
          They are all marked 2.5

          Keep in mind BMW never planed S50/S52 USA in advance. Their real S50 got turned down by EPA emissions, so they had to work with M50, thus the 2.5 markings on the head.

            Comment

            • M-technik-3
              I waste 90% of my day here and all I got was this stupid title
              • Oct 2003
              • 18946
              #4
              Yeah, I am aware of that, I just assumed that there might have been a slight modification to the chamber area. So the only real reason between the different part numbers for the head gasket is to apply towards compression.

              Real S50's buyers would have balked at maintenance costs because I'm sure BMW could have tweaked the tuning to get it to comply with US emissions.
              https://www.facebook.com/BentOverRacing

                Comment

                • Wanganstyle
                  R3VLimited
                  • Apr 2010
                  • 2828
                  #5
                  Originally posted by M-technik-3
                  Yeah, I am aware of that, I just assumed that there might have been a slight modification to the chamber area. So the only real reason between the different part numbers for the head gasket is to apply towards compression.

                  Real S50's buyers would have balked at maintenance costs because I'm sure BMW could have tweaked the tuning to get it to comply with US emissions.
                  The m50/52 engines are 84mm bore
                  S52 is 86.4mm bore

                  Head gasket will reflect this.

                  S54 us version had air pump and catalyst moved to headers; mapping is also different

                  Sent from my GT-N7100 using Tapatalk 2
                  OBD1 M54/M52TU swap as a M50b25

                  Z4 non powered steering rack fits e30



                  Euro e46 2005/6 320d 6mt gearbox into E30 with M20 hardy and beck 1985 327s engine

                    Comment

                    • M-technik-3
                      I waste 90% of my day here and all I got was this stupid title
                      • Oct 2003
                      • 18946
                      #6
                      Originally posted by Wanganstyle
                      The m50/52 engines are 84mm bore
                      S52 is 86.4mm bore

                      Head gasket will reflect this.

                      S54 us version had air pump and catalyst moved to headers; mapping is also different

                      Sent from my GT-N7100 using Tapatalk 2
                      Duh yeah wasn't thinking bore as well,
                      https://www.facebook.com/BentOverRacing

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