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325i M20 alternator

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    325i M20 alternator

    Does anyone know a good source for an alternator?

    Bosch have a 90A p/n AL49X as a re manufactured unit but based on the pictures it appears that some OE one are isolated with rubber bushes and this isnt? can anyone confirm?
    89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

    new build thread http://www.r3vlimited.com/board/showthread.php?t=317505


    #2
    I have noticed that some have bushings and some don't. I don't know which models came with which, it seemed random to me.
    AWD > RWD

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      #3
      It seems that it may be the 80A or ones from e30 m3 with bushings.
      89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

      new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

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        #4
        M10, S14, and M20 up to 11/85 have rubber mounted 80A alternators. The solid mounted one is 90/95A and a direct bolt on replacement.
        Byron

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          #5
          thanks, i started to come to that conclusion myself after enough googling of part numbers.
          89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

          new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

          Comment


            #6
            Originally posted by digger View Post
            Does anyone know a good source for an alternator?

            Bosch have a 90A p/n AL49X as a re manufactured unit but based on the pictures it appears that some OE one are isolated with rubber bushes and this isnt? can anyone confirm?
            don't get one with bushings....it's a common mod to install solid alum. bushings to replace stock as they fail. No bushing...no failures....BMW finally figured it out later on...there is no need for them in the alt.

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              #7
              yeah the bushed are the 80A variants buylooks of it. bought a AL49x solid connection. was more concerned about the OE being bushed and the el cheapo solid.
              89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

              new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

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                #8
                new pulley has no keyway. anyone elase encountered the issue?

                https://www.ecstuning.com/b-genuine-...m/12311288238/

                surely im not upposed to removed the key and run alternator on friction grip?
                89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

                new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

                Comment


                  #9
                  Originally posted by digger View Post
                  new pulley has no keyway. anyone elase encountered the issue?

                  https://www.ecstuning.com/b-genuine-...m/12311288238/

                  surely im not upposed to removed the key and run alternator on friction grip?
                  I remember reading about it. Bosch had a few different pulleys, 2 piece, keyed and non-keyed. The consensus is it will be fine without a key. Install/torque the pulley correctly and belt will slip way before the pulley will.



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                    #10
                    I'll probably just reuse the pulley and if the original in non keyed I'll just replicate that.
                    89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

                    new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

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                      #11
                      The bushing and non-bushed alternators are almost identical - save the front cover. If you have a used non-bushed alternator and a new bushed unit, just remove the bolts and swap covers.

                      Honestly, it's been a bit since I have seen a bushed reman alternator - almost a decade to be less than exact.
                      john@m20guru.com
                      Links:
                      Transaction feedback: Here, here and here. Thanks :D

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