Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Fluid Motor Union
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10-25-2022, 06:04 PM
Member
 
Join Date: Sep 2022
Location: France
Posts: 71
Supr4 is on a distinguished road
Issue with alternator, engine, trans

Hello

I'm still struggling to find the fault in my alternator.
I tried two of them.
The first one was working engine cold and once it was hot, I had to give it a big revv so that it would go back to 13.7v. The battery indicator would light up or flicker.

Second one with regulator connected it worked engine cold once hot it goes down little by little until no charge at all. Unplugged regulator it charges when cold and once hot it charges when I drive but then to a stop it no longer charge. No battery indicator with this one.

Last edited by Supr4; 11-17-2022 at 12:04 PM.
Reply With Quote

Sponsored Links

  #2  
Old 10-25-2022, 06:20 PM
Member
 
Join Date: Apr 2019
Location: Boston, MA
Posts: 816
Effduration is on a distinguished road
I am trying to fix something similar in my '05 3.0 (6cyl). I don't know how old my My OEM Valeo alternator is, but it puts out 13.1 - 13.6 volts when driving, but only 11.7 -12.2 volts when stopped at a light.

I already changed the voltage regulator in the back of the alternator. I am now replacing the whole alternator with a new Valeo one (not rebuilt).

I read your previous posts, you have already replaced your alternator twice ? Did you buy new alternators or rebuilt?

Can you take an alternator to an alternator/starter shop in France and have it tested outside the car?

Last edited by Effduration; 10-25-2022 at 06:53 PM.
Reply With Quote
  #3  
Old 10-25-2022, 06:32 PM
Member
 
Join Date: Sep 2022
Location: France
Posts: 71
Supr4 is on a distinguished road
The last one I actually have is from a alternator specialist shop he gave me an old Bosch one with all parts refurbished as new and new regulator. There is no reason both alternator would be faulty.

Someone told me it could be the engine ground connexion but the mechanic who changed the last alternator told me it was fine but I'm not sure he really checked.
Reply With Quote
  #4  
Old 10-25-2022, 07:03 PM
Member
 
Join Date: Mar 2016
Location: Saskatchewan Canada
Posts: 2,053
80stech is on a distinguished road
If you have 2 different problems with 2 different alternators chances are there is something wrong with both, not at all unheard of.
__________________
1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)
Reply With Quote
  #5  
Old 10-25-2022, 08:03 PM
Member
 
Join Date: Apr 2019
Location: Boston, MA
Posts: 816
Effduration is on a distinguished road
Quote:
Originally Posted by Supr4 View Post
Someone told me it could be the engine ground connexion but the mechanic who changed the last alternator told me it was fine but I'm not sure he really checked.
I agree...the chances both alternator are bad are low.

If my charging is not fixed, I am also going to look at my ground strap AND the cable that comes from that battery that attaches to the jump connection in the engine bay.
Reply With Quote
  #6  
Old 10-25-2022, 11:52 PM
Member
 
Join Date: Mar 2016
Location: Saskatchewan Canada
Posts: 2,053
80stech is on a distinguished road
Grounds are just as important as the positive connections. The best way to check is by looking for a voltage drop (that should have done by the mechanic who checked). There is a good post a few threads down that shows how to do that.
__________________
1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)
Reply With Quote
  #7  
Old 10-26-2022, 08:19 AM
Member
 
Join Date: Jun 2021
Location: Austin, TX
Posts: 1,422
X5chemist is on a distinguished road
Do you have a clamp voltmeter? I'm curious on the amp output reading.
__________________
'06 X5 3.0i - bought @143,123 miles (12/26/20)
Reply With Quote
  #8  
Old 10-26-2022, 09:48 AM
Member
 
Join Date: Apr 2019
Location: Boston, MA
Posts: 816
Effduration is on a distinguished road
Quote:
Originally Posted by Effduration View Post
I am trying to fix something similar in my '05 3.0 (6cyl). I don't know how old my My OEM Valeo alternator is, but it puts out 13.1 - 13.6 volts when driving, but only 11.7 -12.2 volts when stopped at a light.

I already changed the voltage regulator in the back of the alternator. I am now replacing the whole alternator with a new Valeo one (not rebuilt).
Update: My new (not rebuilt) Valeo 140 amp Alternator seems to have solved my problem. I am getting a steady 13.7-13.8 volts at idle and while driving as measured by my cigarette lighter volt meter.

I am a little surprised replacing the voltage regulator on my old alternator did not fix this issue. The voltage regulator was pretty well worn with uneven bushes.

Let's see if we can help OP with his issue.
Reply With Quote
  #9  
Old 10-26-2022, 11:06 AM
Member
 
Join Date: Sep 2022
Location: France
Posts: 71
Supr4 is on a distinguished road
I'm willing to try that theory but in France I'm not sure there is any new ones. I can find Bosch refurbished as new from official stores but it's 700euros.
Reply With Quote
  #10  
Old 10-26-2022, 11:09 AM
Member
 
Join Date: Sep 2016
Location: USA
Posts: 1,109
Bdc101 is on a distinguished road
Quote:
Originally Posted by Supr4 View Post
I'm willing to try that theory but in France I'm not sure there is any new ones. I can find Bosch refurbished as new from official stores but it's 700euros.

Just buy from an ebay seller and pay the international shipping:



https://www.ebay.com/itm/275505819642
__________________
2003 3.0 5MT Topasblau
Purchased in 2016 and surprisingly still running
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 11:36 AM.
vBulletin, Copyright 2024, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
© 2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.