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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 01-05-2010, 09:17 AM
stanggt stanggt is offline
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Location: Michigan
 
Join Date: Oct 2008
Posts: 31
Mein Auto: 98528i
heating issues inside car

developed a heating issue that when car sits and idles the air turn cold until I start driving or bringing up the rpms.At every stop light I come to and wait it gets cold but my temp guage stays right in the middle where it always has been. Just opened hood and felt my hoses and the upper hose is hot but the lower hose is cold. Radiator was new last summer, could it be the thermostat? Heats fine when driving. I have a 1998 528I.
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  #2  
Old 01-05-2010, 09:52 AM
edjack edjack is offline
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Location: San Jose, CA
 
Join Date: May 2007
Posts: 8,327
Mein Auto: '97 540i 6 speed
Lower hose s/b cold. The outside temp is below freezing, right?

Might be the heater valve. Search this forum.
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  #3  
Old 01-05-2010, 11:00 AM
stanggt stanggt is offline
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Location: Michigan
 
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Posts: 31
Mein Auto: 98528i
didnt know it was supposed to be cold when below freezing. Thanks for info I;ll search forum for heater valve
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  #4  
Old 01-05-2010, 11:41 AM
bmw_n00b13's Avatar
bmw_n00b13 bmw_n00b13 is offline
Freude am Fahren
Location: Cambridge, ON
 
Join Date: Feb 2008
Posts: 6,372
Mein Auto: 99 528iA
Search bimmerboard for 1998 528 cooling system overhaul. Sounds like a thermostat jammed open.
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'99 528i ('98/12 build). 174,000km BY29428/Royalrot
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  #5  
Old 01-06-2010, 08:38 PM
GK528i GK528i is offline
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Location: Virginia
 
Join Date: Dec 2008
Posts: 21
Mein Auto: 98 528i, 04 330xi
I was having a very similar problem a few weeks ago. My coolant was a little low but the main problem was the system needed to be purged of air. I found the "how to" by searching the forum here and all seems well. Good luck.
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