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 01-04-2013, 03:37 PM
bin01123's Avatar
bin01123 bin01123 is offline
Officially Welcomed to the 'Fest
Location: Atlanta, GA
 
Join Date: Dec 2010
Posts: 226
Mein Auto: 2001 540i 6 Speed
Cooling System Overhaul

I just completed a cooling system overhaul. I replaced the water pump, thermostat, belts, hoses, and radiator. I put BMW coolant back in with a mix of distilled water. The car run a little rough on startup now but smooths out. Has anyone had this kind of an issue after a cooling system overhaul or any ideas?
Reply With Quote
Advertisement
  #2  
Old 01-04-2013, 06:17 PM
waehrik waehrik is offline
Officially Welcomed to the 'Fest
Location: MA
 
Join Date: Feb 2012
Posts: 122
Mein Auto: e39 530i/5, e28 535i
What prompted the cooling system overhaul?

The reluctant answer of most people is an overheat...
Reply With Quote
  #3  
Old 01-04-2013, 06:30 PM
bin01123's Avatar
bin01123 bin01123 is offline
Officially Welcomed to the 'Fest
Location: Atlanta, GA
 
Join Date: Dec 2010
Posts: 226
Mein Auto: 2001 540i 6 Speed
Cracked radiator

Sent from my HTC VLE_U using Bimmer App
Reply With Quote
  #4  
Old 01-04-2013, 06:37 PM
Fudman's Avatar
Fudman Fudman is offline
Officially Welcomed to the 'Fest
Location: Sudbury, MA
 
Join Date: Apr 2007
Posts: 6,356
Mein Auto: '02 530i Sport auto
You need the expansion tank too. This is a common failure mode.
Reply With Quote
  #5  
Old 01-04-2013, 06:50 PM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 22,082
Mein Auto: 02 BMW 525i M54 auto 130K
The list of things to replace in a cooling system overhaul is long:
- List & picture of all the cooling system overhaul parts to replace (1) (2) (3)

If, as stated in the second post above, the engine overheated, worse things will happen:
- What happens if you drive one mile too far with an overheated BMW cooling system (1).

If you already drove with an overheated engine, then these come into play:
- Summary advice to provide users who suspect a major engine repair due to overheating (1)

Otherwise, these come into play:
- How to diagnose a typical BMW E39 engine misfire (1) o
__________________
Please read the suggested threads, where the best 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
Reply With Quote
  #6  
Old 01-04-2013, 09:27 PM
bin01123's Avatar
bin01123 bin01123 is offline
Officially Welcomed to the 'Fest
Location: Atlanta, GA
 
Join Date: Dec 2010
Posts: 226
Mein Auto: 2001 540i 6 Speed
Quote:
Originally Posted by Fudman View Post
You need the expansion tank too. This is a common failure mode.
I did replace the expansion tank as well. What caused failure mode and where should I look to correct this?
Reply With Quote
  #7  
Old 01-04-2013, 09:30 PM
bin01123's Avatar
bin01123 bin01123 is offline
Officially Welcomed to the 'Fest
Location: Atlanta, GA
 
Join Date: Dec 2010
Posts: 226
Mein Auto: 2001 540i 6 Speed
Quote:
Originally Posted by bluebee View Post
The list of things to replace in a cooling system overhaul is long:
- List & picture of all the cooling system overhaul parts to replace (1) (2) (3)

If, as stated in the second post above, the engine overheated, worse things will happen:
- What happens if you drive one mile too far with an overheated BMW cooling system (1).

If you already drove with an overheated engine, then these come into play:
- Summary advice to provide users who suspect a major engine repair due to overheating (1)

Otherwise, these come into play:
- How to diagnose a typical BMW E39 engine misfire (1) o
Thanks, I'll be looking into the misfire link. The car did not overheat, what happens is the the car gets shakey and rough when I start it up. Then it smooths out and runs fine. It has not overheated during this which is whats got me puzzled to what the issue is.
Reply With Quote
  #8  
Old 01-05-2013, 04:58 AM
waehrik waehrik is offline
Officially Welcomed to the 'Fest
Location: MA
 
Join Date: Feb 2012
Posts: 122
Mein Auto: e39 530i/5, e28 535i
So if it worked fine before, it seems like something changed.

The cooling system itself won't have much of an impact on running since the engine doesn't really know it's there until it isn't working. With the exception of the thermostat which can play a significantly larger role. Make sure that the connector on top is well seated, it's an easy one to overlook.
Also check the VANOS plug if you removed it and any wiring that was disturbed.

I was poking around the overheat/head gasket issue, but if your temp stayed normal then you're fortunate that isn't the cause.

It could also be something mechanical out of balance causing the shaking. Some users have reported missing fan blades and old clutches causing odd vibrations. Just something to think about if it's not an engine shakiness.

Of course it could just be a coincidence too. How is the standard maintenance on the car? Spark plugs, etc? Do you have any codes set or pending? A Peake reader or INPA can likely find the issue in short order.
Reply With Quote
  #9  
Old 01-05-2013, 09:35 AM
bin01123's Avatar
bin01123 bin01123 is offline
Officially Welcomed to the 'Fest
Location: Atlanta, GA
 
Join Date: Dec 2010
Posts: 226
Mein Auto: 2001 540i 6 Speed
Quote:
Originally Posted by waehrik View Post
So if it worked fine before, it seems like something changed.

The cooling system itself won't have much of an impact on running since the engine doesn't really know it's there until it isn't working. With the exception of the thermostat which can play a significantly larger role. Make sure that the connector on top is well seated, it's an easy one to overlook.
Also check the VANOS plug if you removed it and any wiring that was disturbed.

I was poking around the overheat/head gasket issue, but if your temp stayed normal then you're fortunate that isn't the cause.

It could also be something mechanical out of balance causing the shaking. Some users have reported missing fan blades and old clutches causing odd vibrations. Just something to think about if it's not an engine shakiness.

Of course it could just be a coincidence too. How is the standard maintenance on the car? Spark plugs, etc? Do you have any codes set or pending? A Peake reader or INPA can likely find the issue in short order.
It's funny you say a missing fan blade. I dropped the fan clutch (which is new as well) when putting everything back together and broke one of the fan blades off. I didn't think something that small could cause something like that but I did order a replacement fan blade so when I get that in we'll be able to rule that out. I'll re-check to make sure everything is plugged in as well. The standard maintenance on the car was kept up well. Had plugs done about 20K miles ago. I don't have a peake reader or a INPA. Thanks a lot for the help.
Reply With Quote
  #10  
Old 01-06-2013, 02:18 PM
bin01123's Avatar
bin01123 bin01123 is offline
Officially Welcomed to the 'Fest
Location: Atlanta, GA
 
Join Date: Dec 2010
Posts: 226
Mein Auto: 2001 540i 6 Speed
Quote:
Originally Posted by waehrik View Post
So if it worked fine before, it seems like something changed.

The cooling system itself won't have much of an impact on running since the engine doesn't really know it's there until it isn't working. With the exception of the thermostat which can play a significantly larger role. Make sure that the connector on top is well seated, it's an easy one to overlook.
Also check the VANOS plug if you removed it and any wiring that was disturbed.

I was poking around the overheat/head gasket issue, but if your temp stayed normal then you're fortunate that isn't the cause.

It could also be something mechanical out of balance causing the shaking. Some users have reported missing fan blades and old clutches causing odd vibrations. Just something to think about if it's not an engine shakiness.

Of course it could just be a coincidence too. How is the standard maintenance on the car? Spark plugs, etc? Do you have any codes set or pending? A Peake reader or INPA can likely find the issue in short order.
You were right about the missing fan blade being the cause. I removed the fan clucth and the shaking went away. Thanks again.
Reply With Quote
  #11  
Old 01-07-2013, 06:56 AM
waehrik waehrik is offline
Officially Welcomed to the 'Fest
Location: MA
 
Join Date: Feb 2012
Posts: 122
Mein Auto: e39 530i/5, e28 535i
I'm glad you got it fixed, and thanks for reporting back.

It's really amazing how much a small mass can throw off the balance of a big V8 engine. But you have to think, it's not only the small weight of plastic that's missing but the overall pressure of air forced against the blade at at least a couple hundred RPM that's missing.
Reply With Quote
  #12  
Old 01-10-2013, 01:28 PM
bin01123's Avatar
bin01123 bin01123 is offline
Officially Welcomed to the 'Fest
Location: Atlanta, GA
 
Join Date: Dec 2010
Posts: 226
Mein Auto: 2001 540i 6 Speed
The issues is resolved. I got the new fan blade installed and all is still well. Thanks for the help all.
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 09:20 AM.


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