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7 Series - E65 / E66 (2002 - 2008)
Discussion of BMW's 4th generation E65/E66 7 Series flagship. The E65 generated much controversy, due to its radical styling and iDrive user difficulties. Nonetheless, the E65 broke records to become the best-selling 7-series iteration ever, especially after its 2005 facelift.

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  #1  
Old 04-28-2017, 09:48 AM
hotbread2009 hotbread2009 is offline
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Location: Decatur, IL
 
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Mein Auto: 2003 745Li
150Amp water cooled alternator vs. 180amp water cooled

Hi! I'm new to the forum, but have used posts from it for a while now! You guys are super helpful!
So I have an 03 745li with only 125k miles that has the 180amp water cooled alternator. Of course, the bearings went and tore all the internals up so I'm in need of a replacement.
I was wondering if I could either use the 150amp water cooled, or use one of the water cooled alternators from an e38 7-series.
I'd imagine the voltage output and fitment is the same?

Thanks!
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  #2  
Old 04-30-2017, 09:27 PM
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Rick in Yuma Rick in Yuma is offline
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Location: Arizona
 
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Mein Auto: 05' 760li,94' H1,08'Smart
As much extra power the E66 uses I would not drop amps. Plus everything on the car is controlled by computers. It might throw an alternator fault code. Read this document and you decide.

http://freemaxx.de/e90forum/03_Power%20Management.pdf


Did it blow up beyond using one of these?

http://www.ebay.com/itm/121863554941...%3AMEBIDX%3AIT

Last edited by Rick in Yuma; 05-01-2017 at 02:28 AM.
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Old 05-01-2017, 06:11 AM
hotbread2009 hotbread2009 is offline
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Thanks, Rick! That what I figured, especially with how finicky our cars are with the electronics.
Yeah, the bearings inside went and tore up the armature and stator on the inside beyond repair. So, unfortunately, the repair kit wouldn't have worked. I'll just have to get the remanufactured alternator; anyone have good experiences with those?

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Old 05-01-2017, 09:48 AM
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Rick in Yuma Rick in Yuma is offline
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Not sure if you're even going to be able to find a new one. I think because of the age of the car and the fact that their water cooled they're no longer manufactured new. I know that was the case with my starter.

Here's a company I was looking at for when mine goes out again. I think you could increase the amperage output but not decrease it. Or stay the same. Better prices than some I've seen for other rebuilt. However I have no experience with the company. A phone call to them might answer your questions.

http://www.qualitypowerauto.com/cate...lternators.htm

I asked the question in a thread once before here's the response.

http://www.bimmerfest.com/forums/sho...761&highlight=
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Old 05-01-2017, 11:02 AM
hotbread2009 hotbread2009 is offline
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Thanks! All the ones I've found are remanufactured ones.
That's a good website for the HO alternators!

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Old 05-01-2017, 04:14 PM
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Rick in Yuma Rick in Yuma is offline
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Quote:
Originally Posted by hotbread2009 View Post
Thanks! All the ones I've found are remanufactured ones.
That's a good website for the HO alternators!

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Site sells standard amperage alternators also. Do a little more searching when you get time

Last edited by Rick in Yuma; 05-01-2017 at 08:24 PM.
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