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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

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  #1  
Old 01-18-2013, 12:04 AM
gambet55 gambet55 is offline
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Location: Mississippi
 
Join Date: Jan 2013
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Mein Auto: 528xi
In the Red

The bimmer I'm work on sitting at idle, will get into the red fairly quickly. The fan does not engage at all, and is getting power thus was replaced. The Thermostat has been replaced as well. Any Suggestions
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Old 01-18-2013, 12:16 AM
Reuvers Reuvers is offline
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Mein Auto: BMW e39 540i '97
was it bled properly? could be air
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Old 01-18-2013, 09:43 AM
CMRTN CMRTN is offline
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Mein Auto: 98' 540i/6
fan clutch
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Old 01-18-2013, 10:34 AM
uncmozo uncmozo is offline
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Water pump? Old plastic impellers break down over time.
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Old 01-18-2013, 11:07 PM
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BigCo540i BigCo540i is offline
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Fan clutch
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Old 01-19-2013, 06:37 AM
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Fudman Fudman is offline
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Mein Auto: '02 530i Sport auto
Quote:
Originally Posted by gambet55 View Post
The bimmer I'm work on sitting at idle, will get into the red fairly quickly. The fan does not engage at all, and is getting power thus was replaced. The Thermostat has been replaced as well. Any Suggestions
Your post is a bit unclear. Which fan does not engage at all? Which fan was replaced? Does the aux fan ever come on when overheating? The primary cooling fan is activated by the fan clutch (belt driven). That should engage or disengage depending on engine temp. It usually only operates during low speed/stop & go driving when there is insufficient airflow through the radiator. The aux fan (electric driven) only comes on when the primary fan is not moving sufficient airflow. Check your fan clutch first. Do the rolled paper test. Then check your aux fan.

See Issue #1 for fan diagnosis: http://blog.bavauto.com/12247/bmw-an...ostics-how-to/
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