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#1
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Auxiliary fan, weird behavior?
Yesterday was the second time that I noticed this happening. We have a friend whose driveway is a steep uphill, but only 20 yards or so long. We usually get to their place after about 45 minutes of freeway travel. For a second time now, I have noticed that when I park the car on their driveway, the auxiliary fan (the electrical one in front of the radiator) stays on for a few minutes. It doesn't do it after driving on the freeway in other occasions though. Yesterday the weather was cool and rainy, no A/C was on... just a normal 80 mph travel for about 40 minutes, and up this steep driveway for about 20 yards. Both times (yesterday and a couple of months back), I have waited a minute or two for it to turn itself off, it hasn't. I start the engine and stop it again, and it stops. I am assuming there is not much to worry about here, but it is just interesting to see this repeat itself only in this scenario. Is this the normal behavior? how long does it take for the fan to switch itself off? (yesterday, it was on for about 2 minutes before I turned the car on/off and it shut itself down.)
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Currently driving: 2011 E70 x35i , 2011 E90 335d Previous BMWs: 2007 E90 328i , 2005 E53 3.0i, 2011 F10 535i (6spd manual) |
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#2
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The fan runs whenever the engine is warm. It does sem to be a bit random sometimes but it should turn off after a few min. I wouldn't be worried until it stayed on for more than 10-15 min. Mine freaked me out the first time it happened but after I have gotten use to it I don't give it a second thought. Actually nice to think that my BMW is taking care of it self even when the engine is off.
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'03 X5 3.0 -Stahlgrau- |
#3
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Thanks for the feedback. Looking at the vehicle history, I see a fix with auxiliary fan with the previous owner:
6/21/08 40030 electric auxiliary fan pressure fan malfunction I was just wondering if the behavior I see now is the norm, or if it is a malfunction again. Thanks again.
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Currently driving: 2011 E70 x35i , 2011 E90 335d Previous BMWs: 2007 E90 328i , 2005 E53 3.0i, 2011 F10 535i (6spd manual) |
#4
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Sounds more like the fan wasn't working right. More like not spinning properly. But I don't know for sure. Do you have contact with the previous owner? If not maybe one of the mechanics on here would know more.
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'03 X5 3.0 -Stahlgrau- |
#5
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You need to give it a few more minutes to cool the engine down. When you shut it off hot, it is in effect a hot soak, and the engine gets hotter than when it was running (since the water pump isn't circulating coolant). When you restarted it, you circulated the coolant.
Give it more time, and if it shuts off after 5 minutes then you are fine.
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2007 X3 3.0si, 6 MT, Premium, White Retired: 2008 535i, 6 MT, M Sport, Premium, Space Grey 2003 X5 3.0 Steptronic, Premium, Titanium Silver 2002 325xi 5 MT, Steel Grey 2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue |
#6
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Great. Thanks for the feedback guys.
__________________
Currently driving: 2011 E70 x35i , 2011 E90 335d Previous BMWs: 2007 E90 328i , 2005 E53 3.0i, 2011 F10 535i (6spd manual) |
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