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F10 / F11 (2011 - 2016)
The sixth generation of the BMW 5 Series Sedan (F10) was produced from 2011 - 2016 with LCI updates arriving in 2014. In the US BMW offered a hatchback 5 Series Gran Truismo (F07) and the rest of the world also go a Station Wagon/Touring version F11.

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Old 12-15-2010, 03:48 PM
bimluva bimluva is offline
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Fan keeps running

So after a brief 15 mile drive in my new 550 I noticed that when I shut the engine and got out of the car there is a fan running like the engine is still on. I waited about 5 minutes before it finally went out. Is it just cooling down? My 5th BMW and never noticed it like that. I thought maybe I forgot to push the stop button twice so I set the alarm to be sure. Funny thing is I don't think it did that the last time I drove it.
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Old 12-15-2010, 05:10 PM
CarBrain CarBrain is offline
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My 550i does the same thing. It thought it was odd but I guess this is normal.
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Old 12-15-2010, 05:14 PM
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Is it the cooling fan, or some other?

My Volvo has a fan that cools the ECU compartment that runs for a couple of minutes when it shuts down. Could it be some aux type fan like that?
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Old 12-15-2010, 05:17 PM
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I don't think it's actually a fan. All 3 of my BMW's ('05 330i, '08 335i, '11 535i) at times make a slight "fan" sound after shutdown. My '05 made the most sound, and I think it's a pump of some sort -- it doesn't happen consistently, I think after more heavy driving. I had read old threads about a problem where the switch didn't turn the thing off and ran the battery down. My '05 made a "pop" sound when the switch turned it off. I could definitely hear it if the hood was open and ear near the mid-engine area. The '08 and '11 are much quieter.
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Old 12-16-2010, 12:32 PM
Diver624 Diver624 is offline
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Quote:
Originally Posted by bimluva View Post
So after a brief 15 mile drive in my new 550 I noticed that when I shut the engine and got out of the car there is a fan running like the engine is still on. I waited about 5 minutes before it finally went out. Is it just cooling down? My 5th BMW and never noticed it like that. I thought maybe I forgot to push the stop button twice so I set the alarm to be sure. Funny thing is I don't think it did that the last time I drove it.
The fan is electric (not connected to the motor) and will run if the temp. level is too high in the engine compartment. It might go on and off a few times on a hot day after the engine is shut off. Totally normal. The days of the fans operation being dependent on the engine running are long gone on most cars.
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Old 12-16-2010, 02:16 PM
Zathris Zathris is offline
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Originally Posted by [email protected] View Post
The fan is electric (not connected to the motor) and will run if the temp. level is too high in the engine compartment. It might go on and off a few times on a hot day after the engine is shut off. Totally normal. The days of the fans operation being dependent on the engine running are long gone on most cars.
I agree, this type of engine/colling tech has been around for some time. I remember first seeing it in the mid 90's. The reasons for this type of a system, or so I was told, running the Fan and/or the electric water pump after you stop the engine is that block temperatures can spike after engine/cooling system shut off causes extra wear and tear at best and in theory cause damage in the worst case scenarios. With the fans and water still circulating after the engine stops it mitigates the temperature spike you'd normally see.

I'd imagine with the mechanical engineering tolerances tighter than they ever have been, this type of tech isn't just a good idea anymore but a requirement.

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Old 12-16-2010, 03:26 PM
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Always best to drive the last few miles of your journey softly (lower RPM) and let the turbos cool, the Oil temp can get high if you drive Hard.
This high temp will bring the fans on if you shut off after harder driving, it cools the drive train and engine down.
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Old 12-16-2010, 04:31 PM
Diver624 Diver624 is offline
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Quote:
Originally Posted by Zathris View Post
I agree, this type of engine/colling tech has been around for some time. I remember first seeing it in the mid 90's. The reasons for this type of a system, or so I was told, running the Fan and/or the electric water pump after you stop the engine is that block temperatures can spike after engine/cooling system shut off causes extra wear and tear at best and in theory cause damage in the worst case scenarios. With the fans and water still circulating after the engine stops it mitigates the temperature spike you'd normally see.

I'd imagine with the mechanical engineering tolerances tighter than they ever have been, this type of tech isn't just a good idea anymore but a requirement.

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True, plus an electric fan does not reduce the engines output. Mechanical fans require quite a few HP to run.
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Old 12-16-2010, 04:44 PM
Diver624 Diver624 is offline
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Originally Posted by johnbmw6 View Post
Always best to drive the last few miles of your journey softly (lower RPM) and let the turbos cool, the Oil temp can get high if you drive Hard.
This high temp will bring the fans on if you shut off after harder driving, it cools the drive train and engine down.
Good point about turbocharged cars. Even with an electric fan you should drive slowly (without turbo boost) for the last few minutes or let it idle for a few minutes before shutdown after hard driving. This is because the turbo wheels spin very fast (when on boost) and the turbo bearing gets extremely hot and requires continuous oil circulation. When you shut down the engine the oil stops circulating and the hot bearing will no longer be cooled so it will fail prematurely. When the car is idling or your driving without boost the turbo wheel does not spin rapidly so the bearing cools down while oil is circulating. No reason to get crazy about it, just when you drive it hard. You should also make sure you change the oil at least as often as BMW requires.
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Old 12-16-2010, 04:44 PM
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In all my BMW's, I've never seen my cooling fan run after shutdown -- has anyone actually seen this? And two of them were/are turbo's. As I said before, there is some type of pump (exhaust system maybe, or water pump?) that runs at times after engine shutdown for about 15 seconds. Yes, some car's electric fans used to run after the engine was shut off, like Chrysler "K" cars of the 80's. It's kind of passe now, IMO. Anyone ever see their BMW fan run after the engine is off?
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Last edited by markl53; 12-16-2010 at 04:47 PM.
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Old 12-16-2010, 05:02 PM
Emilner Emilner is offline
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Without a doubt my cooling fans do run from time to time after shut off. I opened the hood to confirm what the noise was. It is quite odd, as stated they can run for some time. I have left the car and gone into the house to return 5 minutes later and they are still going....
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Old 12-16-2010, 05:08 PM
Rafa Rafa is offline
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After reading this thread this afternoon, I decided to keep an eye (an ear, actually) on the fan after shutting down the engine. When I got home after a 5-6 mile commute in stop and go traffic, I went to the front of the car and voilá, the fan was running. It is a VERY quiet fan, and I would not have noticed it running if I wasn't looking for the noise.
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Old 12-16-2010, 05:11 PM
Diver624 Diver624 is offline
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Quote:
Originally Posted by markl53 View Post
In all my BMW's, I've never seen my cooling fan run after shutdown -- has anyone actually seen this? And two of them were/are turbo's. As I said before, there is some type of pump (exhaust system maybe, or water pump?) that runs at times after engine shutdown for about 15 seconds. Yes, some car's electric fans used to run after the engine was shut off, like Chrysler "K" cars of the 80's. It's kind of passe now, IMO. Anyone ever see their BMW fan run after the engine is off?
I think the pumps run off the engine so once you shut down the motor the pumps shut down too. It's possible the water pump is electric and might run after engine shutdown, I don't know. Even if that's the case you still want oil circulating through the turbo's to cool down the bearings after hard driving.
Most modern cars (MB, Porsche, Acura, Audi for sure) have electric fans that monitor the engine and under hood temps. and come on to keep both under a specified temp. after the engine is turned off.
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Old 12-16-2010, 06:50 PM
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Ok then.... I'm going to try and catch my fan running after shutdown -- thanks.
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Old 12-16-2010, 07:54 PM
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Both our BMWs will run the auxiliary cool down fan if the engine is turned off after a prolonged strenuous condition, i.e climbing a long gradient up a mountain. This happens regardless of engine revs during the time; rather its a function of how hard the engine had to work.

Completely normal.

markl53, a place where this happens regularly is when I go mountain biking in Frederick MD at Gambrill State Park. After driving up the forest road and turning into the car park, the fan will run for a few minutes. Doesn't seem like a steep gradient, but it is. The AT also automatically downshifts and holds a gear when coasting downhill.
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Old 12-17-2010, 06:27 AM
listerone listerone is offline
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My "d" does the same thing...at least during the summer.I've never waited to hear it switch off because I've always assumed that it's normal.Never noticed it in the colder months,however.
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Old 12-17-2010, 09:56 AM
joshbw joshbw is offline
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Absolutely there is a fan that runs somewhere in the engine compartment after shut down from time to time. I hear it clear as day, my Porsche used to do this also.
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Old 12-17-2010, 10:11 AM
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I think most, if not all cars have this feature of allowing the fan to cool the engine after shutoff if needed. I have heard the fan going in many brands of cars.
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Old 05-20-2017, 10:54 AM
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In Texas fan runs for 2-3 minutes after engine off on my 550. My last .5 mile is in a neighborhood where I am doing max 30 miles so not sure if Turbo not engaging is stopping the fan to not run.


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Old 05-20-2017, 11:42 AM
Simon-Munich Simon-Munich is offline
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Old 05-20-2017, 02:08 PM
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Are those turbos in the 550 still inside the cylinders' V compartment? If so, I imagine the heat inside that area needs quite the maximum time to cool.
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Old 05-20-2017, 02:08 PM
550iFreak 550iFreak is offline
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Engine runs at a operating temp of 105C, oil close to 240F, with two fireballs(turbos) on top of glowing stock cats.....

Damn right the fan are going to run after the engine shuts off from a long drive or a spirited run.

My 550 got the fan to run with the electric pump after a drive for about 2-5 mins depending on outside temp conditions. Here in Florida starting to come in at high 80s to 90s, it will be HOT.

Now granted, I've owned turbocharged cars in the past and knowing that you are supposed to let the car idle when cold, drive gently until temps are up, and also let the car cool down by driving gently to your destination and allow it to idle for a min or so.

The turbos are watercooled along being oil cooled so that helps out alot which should cut the need of idling for cool down( in the past, turbo timers were used to allow the engine to idle while you can go away from the car and it shuts it off for you since most turbos were only oil cooled).

But yes, the electric fan can run even if the car is off along with the electric pump to allow further cooling if needed. It is only an issue if it runs for hours and hours until the battery dies.
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