Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E34 (1989 - 1995)

E34 (1989 - 1995)

Reply
 
Thread Tools Display Modes
  #1  
Old 01-17-2013, 06:30 PM
CraigBMW CraigBMW is offline
Registered User
Location: Melbourne
 
Join Date: Jan 2013
Posts: 10
Mein Auto: 1995 525 E34
Noisy Alternator when idling

Hi,
my alternator makes a loud rattling, almost grinding noise when the motor is idling. It is silent when the rpm increases and functions well. Can anyone suggest a remedy? Thank-you.
Reply With Quote
Ads by Google
  #2  
Old 01-17-2013, 06:32 PM
BMWFatherFigure's Avatar
BMWFatherFigure BMWFatherFigure is offline
Old School
Location: Perth, Western Australia
 
Join Date: Aug 2012
Posts: 1,908
Mein Auto: E23;E30;E38;E32;E34 +
Bearings worn out. Hope for your sake you fix it B 4 the internals touch and spread steel dust through the works. REBUILD OR REPLACE NOW.
__________________
Good - Fast - Cheap: Pick any two.
Current:
E23 735i; E30 318i; E32 735iL (X 2 - 1 Alpine White and 1 Glacier Blue); E34 535i; E38 735iL; R50 Cooper; R55 Cooper Clubman.
Previous:
E21 318i; E32 735iL; E34 535i; E38 730iL; E53 4.4i
Reply With Quote
  #3  
Old 01-17-2013, 06:38 PM
BMR_LVR's Avatar
BMR_LVR BMR_LVR is offline
Humble E34 lover
Location: Asheboro, NC
 
Join Date: Dec 2008
Posts: 5,264
Mein Auto: 1992 525i
Quote:
Originally Posted by bmwfatherfigure View Post
bearings worn out. Hope for your sake you fix it b 4 the internals touch and spread steel dust through the works. Rebuild or replace now.
+1
__________________
Most problems are usually something simple !

Quote:
Originally Posted by noego View Post
It's Deja Poo - as in, I've heard this **** before.
Steve

Calypso Red 1992 525i with 200K miles

1991 735i - Sold
1992 525i - Sold
1995 325is - Sold
2000 528i - Sold

Reply With Quote
  #4  
Old 01-17-2013, 07:40 PM
Monsignor's Avatar
Monsignor Monsignor is offline
BMW CCA Memeber #445389
Location: Pineapple Under the Sea
 
Join Date: Oct 2009
Posts: 3,189
Mein Auto: M50 Big Body
Quote:
Originally Posted by BMWFatherFigure View Post
Bearings worn out. Hope for your sake you fix it B 4 the internals touch and spread steel dust through the works. REBUILD OR REPLACE NOW.
+1,000,000

Replace or rebuild

Sent from Joe's Galaxy SIII via BimmerApp
__________________


1995 525iA 250k mi
2006 325i/6 57k mi
2003 350Z 88k mi

Instagram: @Titan_E34
Snapchat: Titan_E34
Reply With Quote
  #5  
Old 01-17-2013, 07:49 PM
supertech777's Avatar
supertech777 supertech777 is offline
Officially Welcomed to the 'Fest
Location: springfield , missouri
 
Join Date: May 2008
Posts: 750
Mein Auto: 1995 525i
Quote:
Originally Posted by BMWFatherFigure View Post
Bearings worn out. Hope for your sake you fix it B 4 the internals touch and spread steel dust through the works. REBUILD OR REPLACE NOW.


Sent from my Desire HD using Bimmer App
Reply With Quote
  #6  
Old 01-17-2013, 08:31 PM
CraigBMW CraigBMW is offline
Registered User
Location: Melbourne
 
Join Date: Jan 2013
Posts: 10
Mein Auto: 1995 525 E34
Thanks.
BTW - is replacement an easy DIY job ?
Reply With Quote
  #7  
Old 01-17-2013, 08:42 PM
BMR_LVR's Avatar
BMR_LVR BMR_LVR is offline
Humble E34 lover
Location: Asheboro, NC
 
Join Date: Dec 2008
Posts: 5,264
Mein Auto: 1992 525i
Quote:
Originally Posted by CraigBMW View Post
Thanks.
BTW - is replacement an easy DIY job ?
Yes. I would suggest you either purchase a hard copy of the Bentley manual, or you can search this website for a link to a site where you can download it.
__________________
Most problems are usually something simple !

Quote:
Originally Posted by noego View Post
It's Deja Poo - as in, I've heard this **** before.
Steve

Calypso Red 1992 525i with 200K miles

1991 735i - Sold
1992 525i - Sold
1995 325is - Sold
2000 528i - Sold

Reply With Quote
  #8  
Old 01-17-2013, 09:37 PM
CraigBMW CraigBMW is offline
Registered User
Location: Melbourne
 
Join Date: Jan 2013
Posts: 10
Mein Auto: 1995 525 E34
Thanks.
Reply With Quote
  #9  
Old 01-18-2013, 05:24 AM
Monsignor's Avatar
Monsignor Monsignor is offline
BMW CCA Memeber #445389
Location: Pineapple Under the Sea
 
Join Date: Oct 2009
Posts: 3,189
Mein Auto: M50 Big Body
Quote:
Originally Posted by CraigBMW View Post
Thanks.
BTW - is replacement an easy DIY job ?
Remove fan (reverse thread) and shroud
Remove belts (allen key tensioner)
Unplug/Unbolt

Sent from Joe's Galaxy SIII via BimmerApp
__________________


1995 525iA 250k mi
2006 325i/6 57k mi
2003 350Z 88k mi

Instagram: @Titan_E34
Snapchat: Titan_E34
Reply With Quote
  #10  
Old 01-19-2013, 10:24 PM
BMWFatherFigure's Avatar
BMWFatherFigure BMWFatherFigure is offline
Old School
Location: Perth, Western Australia
 
Join Date: Aug 2012
Posts: 1,908
Mein Auto: E23;E30;E38;E32;E34 +
You guys have covered it all...
__________________
Good - Fast - Cheap: Pick any two.
Current:
E23 735i; E30 318i; E32 735iL (X 2 - 1 Alpine White and 1 Glacier Blue); E34 535i; E38 735iL; R50 Cooper; R55 Cooper Clubman.
Previous:
E21 318i; E32 735iL; E34 535i; E38 730iL; E53 4.4i
Reply With Quote
  #11  
Old 01-19-2013, 10:34 PM
luckydog's Avatar
luckydog luckydog is offline
Lucky to drive a BMW
Location: Ca
 
Join Date: Nov 2010
Posts: 1,356
Mein Auto: 2006 M5///
Make sure its not just the nearby inexpensive idler pulley thats near there ,that tends to get loud when its bearings fail. Just spay the affected part with Wd 40 to identify what part goes silent , instantly after spraying.
Reply With Quote
  #12  
Old 01-20-2013, 02:35 PM
CraigBMW CraigBMW is offline
Registered User
Location: Melbourne
 
Join Date: Jan 2013
Posts: 10
Mein Auto: 1995 525 E34
Luckydog, you are spot on, the idler pulley is the problem. Thanks a million.
Reply With Quote
  #13  
Old 01-20-2013, 02:47 PM
Monsignor's Avatar
Monsignor Monsignor is offline
BMW CCA Memeber #445389
Location: Pineapple Under the Sea
 
Join Date: Oct 2009
Posts: 3,189
Mein Auto: M50 Big Body
Do the hydraulic tensioner conversion.

I strongly recommend it

Sent from Joe's Galaxy SIII via BimmerApp
__________________


1995 525iA 250k mi
2006 325i/6 57k mi
2003 350Z 88k mi

Instagram: @Titan_E34
Snapchat: Titan_E34
Reply With Quote
  #14  
Old 01-20-2013, 02:57 PM
CraigBMW CraigBMW is offline
Registered User
Location: Melbourne
 
Join Date: Jan 2013
Posts: 10
Mein Auto: 1995 525 E34
Replacement of the idler pulley would appear to be a simple job. Any traps to be aware of ?
Reply With Quote
  #15  
Old 01-20-2013, 03:06 PM
Monsignor's Avatar
Monsignor Monsignor is offline
BMW CCA Memeber #445389
Location: Pineapple Under the Sea
 
Join Date: Oct 2009
Posts: 3,189
Mein Auto: M50 Big Body
Sent from Joe's Galaxy SIII via BimmerApp
__________________


1995 525iA 250k mi
2006 325i/6 57k mi
2003 350Z 88k mi

Instagram: @Titan_E34
Snapchat: Titan_E34
Reply With Quote
  #16  
Old 01-20-2013, 03:08 PM
CraigBMW CraigBMW is offline
Registered User
Location: Melbourne
 
Join Date: Jan 2013
Posts: 10
Mein Auto: 1995 525 E34
Monsignor, what is the hydraulic tensioner conversion ?
Reply With Quote
  #17  
Old 01-20-2013, 04:44 PM
Monsignor's Avatar
Monsignor Monsignor is offline
BMW CCA Memeber #445389
Location: Pineapple Under the Sea
 
Join Date: Oct 2009
Posts: 3,189
Mein Auto: M50 Big Body
Our m50 machines came with a spring tensior that wears over time. M60 cars (540 and 530 (v8) cars) and m52 (e39 525, 528, amd 530) cars came with little hydraulics for tensioners. They are much more reliable, resiliant, and easily serviceable. They make bolt-on kits for the conversion. I got mine from ECS after my spring tensioner blew, ate both belts, shattered my water pump pulley and busted my water pump. Drivig down the highway at 70 and losing power steering sucks on top of the waterpump.

Busted tensioner thread

Preventative maintenance.

ECS Hydraulic conversion kit

Sent from Joe's Galaxy Tab 2 via BimmerApp
__________________


1995 525iA 250k mi
2006 325i/6 57k mi
2003 350Z 88k mi

Instagram: @Titan_E34
Snapchat: Titan_E34

Last edited by Monsignor; 01-20-2013 at 05:01 PM.
Reply With Quote
  #18  
Old 01-20-2013, 04:54 PM
CraigBMW CraigBMW is offline
Registered User
Location: Melbourne
 
Join Date: Jan 2013
Posts: 10
Mein Auto: 1995 525 E34
Thanks Monsignor, will look into it.
Reply With Quote
  #19  
Old 01-20-2013, 05:01 PM
Monsignor's Avatar
Monsignor Monsignor is offline
BMW CCA Memeber #445389
Location: Pineapple Under the Sea
 
Join Date: Oct 2009
Posts: 3,189
Mein Auto: M50 Big Body
Updated previous post with coversion kit link

Sent from Joe's Galaxy Tab 2 via BimmerApp
__________________


1995 525iA 250k mi
2006 325i/6 57k mi
2003 350Z 88k mi

Instagram: @Titan_E34
Snapchat: Titan_E34
Reply With Quote
  #20  
Old 01-20-2013, 06:36 PM
CraigBMW CraigBMW is offline
Registered User
Location: Melbourne
 
Join Date: Jan 2013
Posts: 10
Mein Auto: 1995 525 E34
Cheers, Thanks.
Reply With Quote
  #21  
Old 01-20-2013, 07:55 PM
BMR_LVR's Avatar
BMR_LVR BMR_LVR is offline
Humble E34 lover
Location: Asheboro, NC
 
Join Date: Dec 2008
Posts: 5,264
Mein Auto: 1992 525i
I recommend that you remove the serpentine belt and check all pulleys and items operated by the belt.

EDIT: I missed it above that you found the problem to be the idler pulley
__________________
Most problems are usually something simple !

Quote:
Originally Posted by noego View Post
It's Deja Poo - as in, I've heard this **** before.
Steve

Calypso Red 1992 525i with 200K miles

1991 735i - Sold
1992 525i - Sold
1995 325is - Sold
2000 528i - Sold


Last edited by BMR_LVR; 01-20-2013 at 08:40 PM.
Reply With Quote
  #22  
Old 01-20-2013, 08:45 PM
BMWFatherFigure's Avatar
BMWFatherFigure BMWFatherFigure is offline
Old School
Location: Perth, Western Australia
 
Join Date: Aug 2012
Posts: 1,908
Mein Auto: E23;E30;E38;E32;E34 +
Change the belt too....
__________________
Good - Fast - Cheap: Pick any two.
Current:
E23 735i; E30 318i; E32 735iL (X 2 - 1 Alpine White and 1 Glacier Blue); E34 535i; E38 735iL; R50 Cooper; R55 Cooper Clubman.
Previous:
E21 318i; E32 735iL; E34 535i; E38 730iL; E53 4.4i
Reply With Quote
  #23  
Old 01-20-2013, 09:30 PM
_Ethrty-Andy_'s Avatar
_Ethrty-Andy_ _Ethrty-Andy_ is offline
E34 Converted E30 Fanatic
Location: Humble New Zealand
 
Join Date: Nov 2008
Posts: 6,135
Send a message via MSN to _Ethrty-Andy_
Mein Auto: E34 Touring AC Schnitzer
interesting, my M52 that i put in my E30 had a spring type setup.
__________________

E30 above Sold

E34 V12 Project Thread Here: http://www.bimmerfest.com/forums/sho...=502437&page=4
Last updated 2nd January 2014
Reply With Quote
  #24  
Old 01-20-2013, 11:24 PM
CraigBMW CraigBMW is offline
Registered User
Location: Melbourne
 
Join Date: Jan 2013
Posts: 10
Mein Auto: 1995 525 E34
The hydraulic tensioner kit looks like the ideal set-up, but I'm not sure about availability and cost in Australia. If replacing the idler pulley with a new original, would the consensus be to replace the (spring) tensioner at the same time (as well as the belt) ?
Reply With Quote
  #25  
Old 01-21-2013, 06:26 AM
Monsignor's Avatar
Monsignor Monsignor is offline
BMW CCA Memeber #445389
Location: Pineapple Under the Sea
 
Join Date: Oct 2009
Posts: 3,189
Mein Auto: M50 Big Body
Quote:
Originally Posted by _Ethrty-Andy_ View Post
interesting, my M52 that i put in my E30 had a spring type setup.
silly kiwis
__________________


1995 525iA 250k mi
2006 325i/6 57k mi
2003 350Z 88k mi

Instagram: @Titan_E34
Snapchat: Titan_E34
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E34 (1989 - 1995)
Today's Posts Search
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 On



Forum Jump


All times are GMT -7. The time now is 12:33 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms