oil cooler or something else running after engine shutoff?

kirby135i · 04-12-2010, 09:30 PM

i hear what sounds like something running under the hood after i shut the car off. It lasts anywhere from 1min to a few but only sometimes. Is this the factory oil cooler or something else?
Thx

4CEFED · 04-12-2010, 09:43 PM

Its coolant running through the intercooler and turbos to prevent coaking. It only does this if you recently boosted before you shut your car off. It is wise to let the car idle down a few minutes before shutting it off, but not neccessary with this new technology we have on these cars.

kirby135i · 04-12-2010, 09:45 PM

oh ok good to know...thanks!

stealth-twntrbo · 04-12-2010, 09:49 PM

think of it as built in turbo timers without leaving the car running

FLA 335 · 04-12-2010, 09:50 PM

Quote:

Originally Posted by 4CEFED

Its coolant running through the intercooler and turbos to prevent coaking. It only does this if you recently boosted before you shut your car off. It is wise to let the car idle down a few minutes before shutting it off, but not neccessary with this new technology we have on these cars.

actually... our intercoolers are not water cooled... as for the turbo's, im not sure... but i do know it is the electric water pump circulation after the car is off... to help cool down all the bits which are cooled by the water/coolant...

onefastman · 04-12-2010, 10:53 PM

It is for the turbos

Imperator · 07-31-2010, 06:02 PM

I hate to bump an old thread but I thought this one is relevant to my question--

I used to hear this noise frequently when I took delivery of my 2010 but since updating the DME for an unrelated service issue, I no longer hear any hint that the water pump is running after vehicle shutoff, even in 100+ degree temps.

Is there some way to verify if/when the water pump runs after shutdown and if this feature was deactivated by a newer engine management revision?

fastloop · 08-01-2010, 05:01 AM

Quote:

Originally Posted by Imperator

Is there some way to verify if/when the water pump runs after shutdown and if this feature was deactivated by a newer engine management revision?

Use a BT cable and look at the actual values for the water pump. Go for a drive and get the engine warm. Then just after shutting it down look at the RPMs for the waterpump. It should go up when the pump is running.

Panoz · 08-01-2010, 07:05 AM

Quote:

Originally Posted by Imperator

I hate to bump an old thread but I thought this one is relevant to my question--

I used to hear this noise frequently when I took delivery of my 2010 but since updating the DME for an unrelated service issue, I no longer hear any hint that the water pump is running after vehicle shutoff, even in 100+ degree temps.

Is there some way to verify if/when the water pump runs after shutdown and if this feature was deactivated by a newer engine management revision?

Its not meant to work EVERY time you turn off the engine. If you've been driving car smoothly , its likely not needed for the pump to work after engine shutdown.

Its also possible not to hear that due to enviromental noise...

If i was you , I would push the car a few times the next time before turning the engine off. This would ensure you if it works or not.

RaceFab · 08-05-2010, 12:55 PM

Its your water pump....could also be a sign of a water pump going bad, ive replaced 2 already and it started by running while the car was off for longer periods of time than normal..ends up drainging the batter...it also took out my steering column and CAS module.

dlbrooks18 · 08-05-2010, 12:59 PM

like others have stated it's our electric water pump...

04-12-2010, 09:30 PM	#1
kirby135i Lieutenant 15 Rep 506 Posts Drives: bmw Join Date: Jun 2009 Location: here iTrader: (1)	oil cooler or something else running after engine shutoff? i hear what sounds like something running under the hood after i shut the car off. It lasts anywhere from 1min to a few but only sometimes. Is this the factory oil cooler or something else? Thx
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04-12-2010, 09:43 PM	#2
4CEFED AKA: MyKaL 21 Rep 202 Posts Drives: 2009 E92 335i Join Date: Nov 2009 Location: North Texas iTrader: (2)	Its coolant running through the intercooler and turbos to prevent coaking. It only does this if you recently boosted before you shut your car off. It is wise to let the car idle down a few minutes before shutting it off, but not neccessary with this new technology we have on these cars. __________________ Still not faster then a crown vic!!!
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04-12-2010, 09:45 PM	#3
kirby135i Lieutenant 15 Rep 506 Posts Drives: bmw Join Date: Jun 2009 Location: here iTrader: (1)	oh ok good to know...thanks!
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04-12-2010, 09:49 PM	#4
stealth-twntrbo Captain 143 Rep 717 Posts Drives: 2020 740xi Join Date: Jun 2009 Location: NA iTrader: (3)	think of it as built in turbo timers without leaving the car running
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04-12-2010, 10:53 PM	#6
onefastman Major General 163 Rep 5,689 Posts Drives: 2009 135i 2011 e92m dct Join Date: Sep 2009 Location: Earth iTrader: (15)	It is for the turbos __________________ Legal Disclaimer: Anything I or anyone else says about my vehicle on this website(1addicts.com or any affiliated or nonaffiliated sites), pertaining to modifications, is only to gain acceptance from my/our peers, and does not actually represent anything actually existing on my car, and thus, cannot be held against me in any issues, i.e. warranty claims, that may arise.
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07-31-2010, 06:02 PM	#7
Imperator Major 57 Rep 1,175 Posts Drives: 2010 E92 335i Join Date: Mar 2010 Location: Plano, Texas iTrader: (8)	I hate to bump an old thread but I thought this one is relevant to my question-- I used to hear this noise frequently when I took delivery of my 2010 but since updating the DME for an unrelated service issue, I no longer hear any hint that the water pump is running after vehicle shutoff, even in 100+ degree temps. Is there some way to verify if/when the water pump runs after shutdown and if this feature was deactivated by a newer engine management revision?
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08-05-2010, 12:55 PM	#10
RaceFab First Lieutenant 10 Rep 329 Posts Drives: 2007 BMW 335i Join Date: Nov 2009 Location: SoCal iTrader: (1)	Its your water pump....could also be a sign of a water pump going bad, ive replaced 2 already and it started by running while the car was off for longer periods of time than normal..ends up drainging the batter...it also took out my steering column and CAS module.
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08-05-2010, 12:59 PM	#11
dlbrooks18 Brigadier General 164 Rep 3,735 Posts Drives: e90 335i Join Date: Nov 2008 Location: Los Angeles iTrader: (2)	like others have stated it's our electric water pump... __________________ 2008 E90 335
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