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 > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

Reply
 
Thread Tools Display Modes
  #1  
Old 01-11-2014, 06:00 AM
krekers krekers is offline
Registered User
Location: Latvia
 
Join Date: Feb 2013
Posts: 13
Mein Auto: 528
Water pump repair?

Hello!


I have a question about water pump. I know that it should be replaced, but I was just wondering - since the water pump is mechanical and in my case only the bearing has gone bad (the cooling system still works, there is only noise and the WP shaft is moving sideways), is it possible to repair water pump by changing only the bearing? I haven't had the chance yet to remove and take a look at the water pump so I don't know whether it is possible or not.
Reply With Quote
Ads by Google
  #2  
Old 01-11-2014, 06:28 AM
JimLev JimLev is offline
Officially Welcomed to the 'Fest
Location: MA
 
Join Date: Dec 2003
Posts: 3,641
Mein Auto: 540/6, S60 Volvo, Tribeca
You can't just replace the bearing, you need a new pump.
Don't wait until its too late!
Reply With Quote
  #3  
Old 01-11-2014, 06:48 AM
ricratcat ricratcat is offline
Registered User
Location: Brandon, Fl
 
Join Date: Aug 2007
Posts: 37
Mein Auto: 1997 Z3 2.8
I learned that the hard way! When my water pump went out, it sent the fan blade into the radiator. I endeded up having to replace the pump fan, and radiador all at the same time!

Sent from my SCH-R820 using BimmerApp mobile app

Last edited by ricratcat; 01-11-2014 at 06:49 AM.
Reply With Quote
  #4  
Old 01-11-2014, 07:20 AM
krekers krekers is offline
Registered User
Location: Latvia
 
Join Date: Feb 2013
Posts: 13
Mein Auto: 528
Ok then, thanks for answers and advices. I'm gonna replace the water pump without hesitation.
Reply With Quote
  #5  
Old 01-12-2014, 12:39 AM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 21,026
Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by JimLev View Post
You can't just replace the bearing, you need a new pump.
Hi Jim,
I fully agree with your assessment as to what all we users always do (which is replace the water pump); but, it 'is' just a spinning impeller, so, ... thinking a bit ... and thinking 'smore ... and, not having thought about it before ... but not knowing the answer ... I must also wonder ... why not just replace the impeller, pulley, and bearings?

I mean, what goes wrong with the thing anyway?

Anecdotally, I've seen impellers fly apart in the threads, and, I've seen bearings siezed - but what else goes wrong with them?
- Pictorial look at typical E39 cooling system failure modes (1)

If it is just the impellers and bearings, why not just rebuild the waterpump, just like we do with alternators?

See also:
- What brand of waterpump to buy (1)

EDIT: I'm guessing what can go wrong are bearings seizing, impellers exploding, pulleys cracking, shafts bending, seals tearing, etc.
Impeller failure:

Impeller failure:

Impeller failure:

Bearing failure:

Bearing failure:

Pulley failure:
Attached Thumbnails
Click image for larger version

Name:	waterpump_impeller.jpg
Views:	340
Size:	39.2 KB
ID:	416600  
__________________
Each repair should invariably add to our knowledge base by the process of inexorable incrementalism.
Your job, in return, is to read the suggested threads, where the best people will always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need

Last edited by bluebee; 01-12-2014 at 01:06 AM.
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)
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 11:50 AM.


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