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  1. #1
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    Member No: 49242 billmarceau is an unknown quantity at this point billmarceau's Avatar
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    anyone have to buy a new alternator lately?

    if so, did you go with the AL43X, OR AL45X? Apparently bosch and most bmw parts suppliers have differring stories.

    i have a 72cs. any opinions appreciated.

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    stoopidcoop
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    Quote Originally Posted by billmarceau View Post
    if so, did you go with the AL43X, OR AL45X? Apparently bosch and most bmw parts suppliers have differring stories.

    i have a 72cs. any opinions appreciated.

    -
    I have a 72 BMW 3.0CCI and it takes a AL45X

    I have to rewire the voltage regulator from the three spade prong type plug in to the back of the alternator. There is a blue wire (I believe this goes to the D+ connection) and also there is a brown and black wire. Does anyone know how to retro fit and wire from the old "external" alternator to make the "Internal"?
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    Member No: 129993 Earlyshark is an unknown quantity at this point Earlyshark's Avatar
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    I recently changed a Bavaria to an '81 alternator, I'll have to look at it again, but the rewiring is very simple. If you have access to early (ie Bavaria/2800CS) and the wiring diagram of a later (e12/e24/e28) it is easy to figure out. The blue wire that is on the external regulator goes to the charge warning light on the dash is cut and rerouted to the alternator. What is nice about the later alternators is that you can change the regulator/brushes without removing the alternator from the car ... disconnect the battery first!
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    Member No: 50104 PimpSled is an unknown quantity at this point PimpSled's Avatar
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    I have a whirling jet sound form my alternator. Removed and found a ton of packed leaves and debris in the air cooling part of the alternator.

    Might be a good idea to inspect the air duct to the alternator time time.
    -2000 528i 6 cyl. but you know that
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