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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 11-23-2012, 04:08 PM
Talh3 Talh3 is offline
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E39 540i thermostat replacement please help

Hello , I hope you all had a happy thanksgiving !!! I am replacing the thermostat at the water pump and would appreciate if some one could please send me a DIY preferably with pictures of this procedure as I am very new on here!! Also do I need to drain some of the antifreeze first , if so how ? And how to bleed the system I f I need to? I have searched for threads and want to make sure I have all the right info. Thanks so much, Talmadge.
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  #2  
Old 11-23-2012, 09:02 PM
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bluebee bluebee is offline
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Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by Talh3 View Post
I have searched for threads and want to make sure I have all the right info.
Just type /cooling system F3 into the bestlinks and you'll find all you need.
For example:

- E39 Fan shroud removal DIY (Besian) (M54) & some of the better cooling system DIYs (cn90 1997-1998 M54TU) (cn90 V8) (aioros '99-03 M54) (Ågent99 '01 530i) (pelican 3-series) (bluebee M54B25) & tricks to replace the fan clutch nut (1) & lower-hose thermoswitch o-ring (1) & to non-destructively remove the heater hoses (1) or radiator nipple (1) or expansion tank nipple (1) (2) or Oetiker clamp (1) or misplaced thermostat wiring loom (1) or broken bleeder screw (1)
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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
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  #3  
Old 11-24-2012, 06:40 AM
Talh3 Talh3 is offline
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Thanks for the great info. I'm gonna be replacing the thermastat today and will post results when done! Thanks again, Tal.
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  #4  
Old 11-24-2012, 08:49 AM
mbell666 mbell666 is offline
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Mein Auto: e39 2002 540i6
Its pretty easy, drain radiator using drain plug. Remove coolant pipe, unbolt, bolt new one on. Fill and bleed. Having the nose in the air helps with bleeding. Hardest bit is access to bottom rear bolt.

What's the rest if the cooling system like? I did my thermosat and literally a week later the water pump failed! If you not sure about the rest of the system I'd consider replacing it all in one go. I wish I done it it one go after getting the car....
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An e39 is like a beautiful wife, needs constant attention, lots of money, lets you down at the worse times but you’d never be without it.
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Old 11-24-2012, 10:25 AM
edjack edjack is online now
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The '97 doesn't have a coolant pipe. I believe this came on the -TU engine.
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Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.
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Old 11-24-2012, 11:05 AM
Talh3 Talh3 is offline
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Thanks for the help !!! I am new on here and very green but am ready and willing to learn how to maintain my 540i , i am a bmw fan!! I really love this site , I've learned so much already and I appreciate you all very much!!!! Thanks again, Tal.
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Old 11-24-2012, 05:21 PM
Talh3 Talh3 is offline
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I replaced the thermostat and it seems fine but I noticed the vent on my drivers side blows cold air and the passengers side blows hot air when both sides are set at 90* . I've read that it could be the heater control valve, any thoughts on what it may be and how to fix it? Thanks Tal.
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  #8  
Old 11-24-2012, 06:12 PM
edjack edjack is online now
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Location: San Jose, CA
 
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Mein Auto: '97 540i 6 speed
Unplug the heater valve. If you then get heat, it's the valve.

It could also be air in the left side heater core. Bleed the system.

Otherwise, there may be a fault in the IHKA panel.

If you're going to wrench on this car, get a Bentley manual and a scan tool.
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Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.
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  #9  
Old 11-25-2012, 10:26 AM
Talh3 Talh3 is offline
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Thanks for the reply! I'll try unplugging the valve later and post results. Thanks again , Tal.
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