Fan kicks on when car gets hot?

blau808 · 04-07-2016, 09:17 PM

I've noticed when its hot outside, or when im pushing my car hard, sometimes a little whirring noise will kick in which is quite noticable from the interior of the car, im assuming a fan of some sort.

I realize this post lacks a lot of details but can anyone tell me what this might be? 2010 335xi.

fulltilt444 · 04-07-2016, 09:23 PM

Normal. Radiator fan.

blau808 · 04-07-2016, 09:24 PM

Quote:

Originally Posted by fulltilt444

Normal. Radiator fan.

Thanks. It seems so loud in the interior though, just a constant whirr. Does it kick on at a certain temp?

3.1L Z · 04-07-2016, 09:42 PM

Think it kicks in at 105 Celsius

Cory S · 04-07-2016, 11:22 PM

Low speed comes on at 242*F (116*C), high speed @ 250*F (121*C)

olivojoe · 04-08-2016, 06:36 AM

Quote:

Originally Posted by blau808

I've noticed when its hot outside, or when im pushing my car hard, sometimes a little whirring noise will kick in which is quite noticable from the interior of the car, im assuming a fan of some sort.

I realize this post lacks a lot of details but can anyone tell me what this might be? 2010 335xi.

It shouldn't be too loud from inside the car, assuming windows are all up. I cant hear mine unless I am at a stop with the windows down, and I am in FL where it is 90F+ for several months a year.

I would check a few things:

Make sure the radiator fan shroud doesn't have any debris on/in it that is making contact with the fan.

When the car is OFF, play with the fan blades to see if there is any play in the bearing for the fan.

jt335i · 04-08-2016, 08:17 AM

I hear the same on mine too on hot days or if I have been driving on a long road trip. I am assuming you have the Logic 7 sound system. If so, I'm pretty sure it's the cooling fan on the amp that's kicking on.

BKBMW335I · 04-08-2016, 08:53 AM

Quote:

Originally Posted by blau808

I've noticed when its hot outside, or when im pushing my car hard, sometimes a little whirring noise will kick in which is quite noticable from the interior of the car, im assuming a fan of some sort.

I realize this post lacks a lot of details but can anyone tell me what this might be? 2010 335xi.

Get a FMIC and an oil cooler.

Welcome to NBA Jam · 04-08-2016, 08:58 AM

Well yeah, that's what fans are for.

BSM n54iS · 04-08-2016, 09:09 AM

Quote:

Originally Posted by jt335i

I hear the same on mine too on hot days or if I have been driving on a long road trip. I am assuming you have the Logic 7 sound system. If so, I'm pretty sure it's the cooling fan on the amp that's kicking on.

HUH?!

...don't ass-ume things

Anyways OP, you're in Hawaii...things get hot then you turn a fan on, right?? There's no problem..

jt335i · 04-08-2016, 10:09 AM

Quote:

Originally Posted by Black n54is

HUH?!

...don't ass-ume things

Anyways OP, you're in Hawaii...things get hot then you turn a fan on, right?? There's no problem..

Ha ha bro.

Ok. I shouldn't have said assume. More a like hunch!!!
If OP can record a video or audio of the fan sound when it happens, then we will see if my hunch is right.

ThugzZ BunnY · 04-08-2016, 10:12 AM

I live in the south and it gets very hot here. the only time mine has come on is when the waterpump went out.

Kevinl · 04-08-2016, 06:26 PM

Quote:

Originally Posted by Cory S

Low speed comes on at 242*F (116*C), high speed @ 250*F (121*C)

I dont think the fan has speeds per say it works off pwm to vary the speed to meet the conditions mine is really loud in the summer when its really hot outside and it is kind of unpleasant when its running full speed but as long as the car has cold a/c and doesnt overheat im fine with it

3.1L Z · 04-08-2016, 07:59 PM

Quote:

Originally Posted by BKBMW335I

Get a FMIC and an oil cooler.

Already has both.....

feelurpain330xi · 04-09-2016, 03:08 PM

On my 06 330xi you can hear the fan for the sound system in the trunk when you shut off the motor on a hot day. Next time you hear it, open the trunk and listen. if the sound is coming form there you will be able to tell.

04-07-2016, 09:17 PM	#1
blau808 Second Lieutenant 89 Rep 254 Posts Drives: E90 F31 X5 Join Date: Dec 2012 Location: PNW iTrader: (0)	Fan kicks on when car gets hot? I've noticed when its hot outside, or when im pushing my car hard, sometimes a little whirring noise will kick in which is quite noticable from the interior of the car, im assuming a fan of some sort. I realize this post lacks a lot of details but can anyone tell me what this might be? 2010 335xi.
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04-07-2016, 09:23 PM	#2
fulltilt444 Private First Class 25 Rep 126 Posts Drives: 09 E90 335xi Join Date: Apr 2014 Location: Connecticut iTrader: (0)	Normal. Radiator fan.
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04-07-2016, 09:42 PM	#4
3.1L Z Private First Class 26 Rep 186 Posts Drives: '09 E92, Cobb AP Join Date: Jul 2012 Location: San Antonio iTrader: (0)	Think it kicks in at 105 Celsius __________________ '11 E92, MSport 3 Pedal 3.1L Stroker Z
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04-07-2016, 11:22 PM	#5
Cory S Major 305 Rep 1,163 Posts Drives: 2011 335i-X Join Date: Oct 2015 Location: N.H. iTrader: (0)	Low speed comes on at 242F (116C), high speed @ 250F (121C)
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04-08-2016, 08:17 AM	#7
jt335i Major 263 Rep 1,225 Posts Drives: 2010 E92 335i Monaco blue Join Date: Jan 2010 Location: Tampa, Fl iTrader: (0)	I hear the same on mine too on hot days or if I have been driving on a long road trip. I am assuming you have the Logic 7 sound system. If so, I'm pretty sure it's the cooling fan on the amp that's kicking on. __________________ 2010 BMW 335i: Monaco blue metallic/Premium+Sport Auto-Steptronic, BMW PE, Cobb Stage 2 2005 Mustang GT: Redfire metallic/5-spd/Ford Racing (Axle backs, silver Bullitt wheels)/K&N CAI/ Diablo Sport Predator Tuner 1997 Toyota Corolla 1983 Mercedes Benz 380SL Roadster
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04-08-2016, 08:58 AM	#9
Welcome to NBA Jam Is it the shoes!? 3884 Rep 5,112 Posts Drives: (Sold) 2011 E92 335i ZMP 6MT Join Date: Mar 2014 Location: USA iTrader: (1)	Well yeah, that's what fans are for.
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04-08-2016, 10:12 AM	#12
ThugzZ BunnY Major 682 Rep 1,155 Posts Drives: 2011 335i Join Date: Jan 2015 Location: BMW of Chattanooga iTrader: (0)	I live in the south and it gets very hot here. the only time mine has come on is when the waterpump went out. __________________ IG: @andy__wise Inquiries: Andrew.Wise@bmwofchattanooga.com
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04-09-2016, 03:08 PM	#15
feelurpain330xi New Member 0 Rep 6 Posts Drives: 2006 330xi Join Date: Apr 2016 Location: Portland, OR iTrader: (0)	On my 06 330xi you can hear the fan for the sound system in the trunk when you shut off the motor on a hot day. Next time you hear it, open the trunk and listen. if the sound is coming form there you will be able to tell.
	Appreciate 0 Quote