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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 05-20-2013, 04:38 PM
DarkHorseMBA DarkHorseMBA is offline
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Loud cooling fan?

My 2011 e93 has some real loud cooling fans. Today traffic, at a stand still, the fans kicked on and man they were loud.
This also happen when I pull into the garage, stop lights etc. it's about 99f out side and I have the AC on. No warning lights and the oil temp is below 250f.

Is this normal, should I be concerned?


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  #2  
Old 05-20-2013, 04:54 PM
roadkillrob roadkillrob is offline
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Sounds about right, these cars generate a lot of heat - if it is really excessive, it is an indication the water pump is going to fail, but in 100 degree heat in traffic, it is normal and they do move a lot of air!!
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  #3  
Old 05-20-2013, 06:52 PM
CALLAWAY845 CALLAWAY845 is offline
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Hey Darkhorse, my fans on my '09 328i really are loud as well.
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  #4  
Old 05-20-2013, 08:05 PM
DarkHorseMBA DarkHorseMBA is offline
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Loud cooling fan?

Thanks, feeling better about it. Had the car checked out at the dealer after I bought it in march. The SA said it was in great shape, and still has factory warrantee until September 2014.

As for the water pump is there a way to check that, or it'll just fail when it wants to?


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  #5  
Old 05-20-2013, 08:22 PM
Danforth Danforth is offline
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I have an 09' 335i Xdrive coupe and the fan is super loud, I hate it people always comment.
Does anyone know what you can upgrade to aftermarket parts to eliminate this?
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  #6  
Old 05-21-2013, 05:52 AM
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David1 David1 is offline
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Your water pump is dying....
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  #7  
Old 05-21-2013, 06:17 AM
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DSXMachina DSXMachina is offline
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Quote:
Originally Posted by Danforth View Post
I have an 09' 335i Xdrive coupe and the fan is super loud, I hate it people always comment.
Does anyone know what you can upgrade to aftermarket parts to eliminate this?
The BMW fans are as quiet as they can be given the volume of air they are moving. Don't even think about changing them. Think of them as the cooling system equivalent of a performance exhaust system and you will come to love the sound.
Next time one of your friends comments about the noise just tell him that your fan blades came off a Messerschmitt. And theirs came off a Hampton Bay ceiling fan.
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  #8  
Old 05-21-2013, 06:19 AM
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DSXMachina DSXMachina is offline
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Quote:
Originally Posted by David1 View Post
Your water pump is dying....
We are all dying, some of us more slowly than others. "When?" is what we don't know.
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  #9  
Old 05-21-2013, 06:27 AM
DarkHorseMBA DarkHorseMBA is offline
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Loud cooling fan?

Quote:
Originally Posted by David1 View Post
Your water pump is dying....
So any way to avoid sudden death?
Of the water pump that is.


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  #10  
Old 05-21-2013, 08:01 AM
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tturedraider tturedraider is offline
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I'm not quite sure what is going on, but contrary to some previous opinions you were given, this behavior is not normal. My car has exhibited it four or five times in the past six months. Most times I have pulled into a parking lot and turned off the car for two or three minutes and it has corrected itself. A couple of times it has corrected itself before I stopped the car. I am unsure what is causing it, but I suppose it could be a sign of a failing water pump. My car has about 86k miles on it.

What I'm referring to is a loud roar from the fan that can be heard with the windows up and the radio on. It is not a normal condition.
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Last edited by tturedraider; 05-21-2013 at 08:03 AM.
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  #11  
Old 05-21-2013, 09:43 AM
roadkillrob roadkillrob is offline
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Quote:
Originally Posted by tturedraider View Post
I'm not quite sure what is going on, but contrary to some previous opinions you were given, this behavior is not normal. My car has exhibited it four or five times in the past six months. Most times I have pulled into a parking lot and turned off the car for two or three minutes and it has corrected itself. A couple of times it has corrected itself before I stopped the car. I am unsure what is causing it, but I suppose it could be a sign of a failing water pump. My car has about 86k miles on it.

What I'm referring to is a loud roar from the fan that can be heard with the windows up and the radio on. It is not a normal condition.
That sounds like a water pump starting to go - the OP said it happened in high heat in traffic which is not abnormal, but yours definitely sounds like a potential water pump issue and the fan is starting to compensate and your mileage is about right for water pump life.

Unfortunately with electric water pumps you don't get much warning if any, they just up and die one day, some people get some warning signs, others none.

It seems what the water pump flow rate drops off a bit and then the cooling fan runs faster to compensate, then the pump just up and dies one day.

It may be worth checking for codes to see if the car has seen anything with the water pump, but otherwise you can either wait until it dies or proactively replace it (which is not cheap!).
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  #12  
Old 05-21-2013, 11:26 AM
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DSXMachina DSXMachina is offline
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There is a way to manually activate the water pump in a stopped engine (with the key on). It is part of the bleeding procedure. Unfortunately it is known to the smart techs who work for me and not me, and I'm not at the shop today.
If the OP activates just the pump he'll know for sure if that's the noise. Anyone?
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  #13  
Old 05-21-2013, 11:39 AM
Watchme Watchme is offline
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Quote:
Originally Posted by DSXMachina View Post
We are all dying, some of us more slowly than others. "When?" is what we don't know.
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  #14  
Old 05-21-2013, 11:46 AM
Watchme Watchme is offline
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Quote:
Originally Posted by DSXMachina View Post
There is a way to manually activate the water pump in a stopped engine (with the key on). It is part of the bleeding procedure. Unfortunately it is known to the smart techs who work for me and not me, and I'm not at the shop today.
If the OP activates just the pump he'll know for sure if that's the noise. Anyone?
Might be the same as 335, steps 43 ~ here
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  #15  
Old 05-21-2013, 12:01 PM
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DSXMachina DSXMachina is offline
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Quote:
Originally Posted by Watchme View Post
Might be the same as 335, steps 43 ~ here
Good catch, that procedure does sound familiar. OP, run your pump and if it the noise sounds like the pump then it's the pump. If not...it's normal high speed fan sound. Probably. Maybe.
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  #16  
Old 05-21-2013, 12:09 PM
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DSXMachina DSXMachina is offline
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Quote:
Originally Posted by DarkHorseMBA View Post
So any way to avoid sudden death?
Of the water pump that is.


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Failure will either be of seals, or electrical. There's nothing you can do preventively if it's electrical, other than changing your electricity filter* every 30,000 miles. The best way to keep your seals fresh is to change your (lifetime!) coolant every 2 or 3 years. This is because they all pick up microsolids which remain in suspension and are abrasive to the seal lip.





*
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  #17  
Old 05-21-2013, 02:15 PM
DarkHorseMBA DarkHorseMBA is offline
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Quote:
Originally Posted by roadkillrob View Post
It may be worth checking for codes to see if the car has seen anything with the water pump, but otherwise you can either wait until it dies or proactively replace it (which is not cheap!).
I've taken it to the dealer and mentioned the fans, about a month ago. They kind of brushed me off as if I was making a big deal of nothing. That being said they did "check for codes" and fond nothing wrong with the car in general, not looking for the pump or fan issue. I assume no codes is a good thing. If the pump is dying I don't think it's letting on, outside of the fan noise.
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  #18  
Old 06-15-2014, 07:03 AM
Len1975 Len1975 is offline
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Did you ever find out what the problem was, because I had this same issue. I took my car to BMW and no they found no codes and brushed me off and said all was fine...I cannot take this loud embarrassing noise.
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  #19  
Old 06-15-2014, 07:21 AM
DarkHorseMBA DarkHorseMBA is offline
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Got the same response from my dealer. Just been living with it.
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  #20  
Old 06-15-2014, 09:10 AM
GeForce GeForce is offline
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I own an 08 E90 and when I kick on the AC it is pretty loud. Turn off the AC it's quite like a stealth kitten hunting after a mouse!

Luckily I do not have to turn on my AC much in my neck of the woods.
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  #21  
Old 06-15-2014, 09:16 AM
DarkHorseMBA DarkHorseMBA is offline
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In fall - spring I might be able to get away with that.
Texas summer, no way! I even run the AC with the top down :-). The wind deflector help with this.
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  #22  
Old 06-15-2014, 09:33 AM
sna66 sna66 is offline
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I recently got an 07 328i and I'm in Florida heat. The first time I heard the fan kick in I really thought there was a problem but after reading similar experiences I'm not concerned

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  #23  
Old 06-15-2014, 11:46 AM
z28forlife z28forlife is offline
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I work for bmw as a technician. Your water pump or thermostat or both are on there way out. One day you'll get a check engine light and then the dealer will be able to replace it under warrenty. But until a check engine light is on they're hands are kinda tied. Warranty is a bitch to deal with. But not to worry, even when it does go out it will keep the thermostat open so the car won't overheat. The thermostat and water pump are both electric so one day they work and the next they don't.
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  #24  
Old 06-15-2014, 03:10 PM
fdriller9 fdriller9 is online now
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If the radiator fan is kicking on right after a cold start or is screaming right after driving, your water pump is most likely going.
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  #25  
Old 06-15-2014, 05:39 PM
Len1975 Len1975 is offline
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I hate that noise...It never did it before and now it just will not stop and it is really loud!

Last edited by Len1975; 06-16-2014 at 06:06 PM.
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