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General E46 Forum
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Old 04-17-2013, 12:57 PM   #21
pleiades
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More good info. Wondering how rebuilders get away with just replacing the bearings and a new coat of paint and maybe brushes.

I will caution against replacing the VR though while still inside the car. The screws are of very soft material (brass maybe?) and strip very easily as they are very tight. So I recommend taking it out of the car to remove the VR so you can visually match the correct size screwdriver and apply the appropriate amount of torque at the right angle. Even off the car they started to strip!! luckily I used a bigger screwdriver and they came off easily with minimal scarring.

The VR I bought was Bosch and only $37!!
Well, on my alt the regulator mounting screws are steel but you know, if space limitations are a factor in how well you can replace the regulator with the unit on the car, removal seems like a good option.

Just bear in mind that some people will also have problems with alt removal/re-installation and the risk of damaging other things much more serious ... e.g., cracking the aluminum alternator mount on the OFH by trying to use force against tight tolerances, or being unable to de-tension the serpentine belt tensioner without stripping the pulley spindle bolt.... etc etc.
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Old 04-17-2013, 12:59 PM   #22
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Well, on my alt the regulator mounting screws are steel but you know, if space limitations are a factor in how well you can replace the regulator with the unit on the car, removal seems like a good option.

Just bear in mind that some people will also have problems with alt removal/re-installation and the risk of damaging other things much more serious ... e.g., cracking the aluminum alternator mount on the OFH by trying to use force against tight tolerances, or being unable to de-tension the serpentine belt tensioner without stripping the pulley spindle bolt.... etc etc.
You are right. In those cases, I would recommend a mechanic for those people!
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Old 04-17-2013, 03:29 PM   #23
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Mango if successful perhaps worth refurbishing some Alternators for other people as a business?

Also I'm sorry my previous comment not the best I was just eluding to the need to really strip it down and see what bearing it *actually* uses. Perhaps in the factory they have different bearings for different years of manufacture or even different for each batch?
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Old 04-17-2013, 03:43 PM   #24
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Mango if successful perhaps worth refurbishing some Alternators for other people as a business?

Also I'm sorry my previous comment not the best I was just eluding to the need to really strip it down and see what bearing it *actually* uses. Perhaps in the factory they have different bearings for different years of manufacture or even different for each batch?
Not at all. No interest in alternators as a business whatsoever.
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Old 04-17-2013, 08:07 PM   #25
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Not at all. No interest in alternators as a business whatsoever.
Ok, will get the sub and hope to hear you get your alt refurbed
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Old 04-19-2013, 11:49 PM   #26
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I did a little more looking and verified the E46 Bosch 120A alternator does in fact use the bearing sizes I listed. The Bosch alternator part# is 0123515022. So this Bimmerfest article DOES apply to our E46s that use the Bosch 120A alternator that has the# 0123515022 on it.

http://www.bimmerfest.com/forums/sho...d.php?t=454325
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Old 04-20-2013, 01:44 AM   #27
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... The Bosch alternator part# is 0123515022...
Good, that's the same P/N for the one in my '99 528i.
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Old 09-25-2013, 10:43 PM   #28
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Eh I'm not trying to save money. It's a project for fun. I know what's involved with an alternator. I don't need any lessons or advice. I know exactly what I'm getting into.

Moving on
So, it has been 5 months since you posted this.
Have not finished job yet or care to give a feedback to this kind of post?

http://forum.e46fanatics.com/showthr...ght=alternator
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