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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 12-12-2015, 09:00 AM
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eparayno eparayno is online now
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Location: Vista, CA
 
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Mein Auto: 2001 530i
I FINALLY have to replace parts!

It's been over 3 years since replacing a bunch of old things in the engine, mainly just gaskets and hoses, changing the trans fluid, vanos seals etc etc. Over that time period all I had to do was change the oil.

While sitting at a light on a 85 degree day I noticed the temp needle move to about the 3/4 mark going towards hot. I've never seen the needle move past the 12 o clock position ever. The stop light turned green right when the needle moved and when I started moving the needle went back to 12 o clock. The aux fan had been coming on high speed a few days before this but I had no time to check(2 year old daughter!) I got home and I open the hood and the engine fan looked like it was spinning extremely slow, I did a dumb thing and touched it with my finger and that actually stopped it. I shut off the engine and it did about 3 revolutions so the fan clutch was toast.

It is a Behr fan clutch, I think OE was Sachs? So it was probably changed at some point by the previous owner. I'm just excited to wrench on it finally. I have another Behr fan clutch coming in along with serpentine belts and I will also have to check the coolant sensor in the lower radiator hose because the aux fan did not go on full blast when the temp needle started moving. The fan still comes on when I turn on the AC though so some diagnosing is in the works.

So far this has been an extremely reliable baby hauling car, just put in some gas and go. 166,000 miles on her right now and still going strong.

Last edited by eparayno; 12-12-2015 at 09:01 AM.
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  #2  
Old 12-12-2015, 09:07 AM
Barracuz Barracuz is offline
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Location: Providence, R.I.
 
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Mein Auto: 2001 525i 5 spd
Glad to hear you haven't had much problems and that you are ready to tackle the job.
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  #3  
Old 12-12-2015, 10:10 AM
cn90 cn90 is offline
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Mein Auto: 1998 528i 5-sp 140K+
Stay away from Behr.
Sachs only when it comes to Fan Clutch.
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  #4  
Old 12-12-2015, 11:58 AM
berkeleydojah berkeleydojah is offline
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Mein Auto: 2001 bmw 540i (sport)
I thought behr was the oem maker of the fan tho?
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  #5  
Old 12-12-2015, 03:19 PM
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matt540 matt540 is offline
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Mein Auto: 2000 DINAN 540, 1983 745
You could do the electric fan conversion.
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  #6  
Old 12-19-2015, 11:39 PM
Slum_540 Slum_540 is offline
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Mein Auto: 97 540i
I can't keep mine from breaking... I'm hoping soon il have a period of peace.
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  #7  
Old 12-20-2015, 12:07 PM
BavarianE31 BavarianE31 is offline
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The OP actually started to overheat due to a crippled fan clutch? Aux fan wasn't sufficient I suppose. I'm running without the mechanical fan at the moment and couldn't find anything on people doing the same and overheating. I just couldn't stand the loud truck roar with the Sachs clutch.
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  #8  
Old 12-20-2015, 04:56 PM
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eparayno eparayno is online now
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Location: Vista, CA
 
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Mein Auto: 2001 530i
Quote:
Originally Posted by matt540 View Post
You could do the electric fan conversion.

I did do one and had it for a year or so but the fan controller started burning up relays so instead of tinkering with it I slapped on the old mechanical fan.

I ended up changing the order and got a Meistersatz fan clutch, made by CRP Industries. So far it's working great after a few hundred miles. Roars on startup and for maybe a 1/4 mile or less then quiets down and roars again in stop and go traffic/stop lights.

My aux fan came on at full speed twice before I checked the fan clutch but did not turn on when the temp needle started moving. Still turns on with the AC though.
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  #9  
Old 12-20-2015, 05:22 PM
djdonsi djdonsi is offline
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Location: Charlotte, NC
 
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Mein Auto: 330i 6sp, 540i M-sport
I would suggest changing the water pump as well if it was never changed. With the clutch and belts off (your are changing them too, right?) wiggle the WP and see if there's some play in the bearings.
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  #10  
Old 12-21-2015, 03:43 AM
Sroor9001 Sroor9001 is online now
ALGhoul
Location: Bahrain
 
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Mein Auto: Bmw 525i 2002
I've installed e46 with same setup of aux fan but you have to remove fan shroud
And I've connected aux fan with Mercedes 85C sensor on the same radiator hose and wire it with relay and all are fine
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