2011 E92 weird noise under hood

sirjake · 02-19-2020, 04:42 PM

Hello there,
I've got this weird noise that happens when the car is first opened and when shutting the car off and getting out lasts for a few minutes.

I made a quick video of it. BMW said it was the coolant pump and it needs to be replaced, however seems a little odd if that kicks on when just opening the door.

Thanks for any help or suggestions.

sirjake · 02-20-2020, 09:48 AM

Anyone have some ideas on this weird noise?
Going to try and take a closer look at it later today if I have time, however hopefully not the first person with this weird noise issue.

IllSic_Design · 02-20-2020, 09:52 AM

Definitely does sound like the water pump. Have you scanned for any pending codes?

relative4 · 02-20-2020, 09:52 AM

Pull the codes. Use a mechanic's stethoscope.

delmarco · 02-20-2020, 10:02 AM

A failing Waterpump sounds more like a heavy deep fan (sort of like an idling UPS truck).

This is more of a buzzing electrical sound.

I don't get why it only happens when the door is opened though.

Could be battery related or belt and pulley system related.

neilvan · 02-20-2020, 10:16 AM

Had the issue on my E60(n52) that the waterpump was always running. Try unplugging it, and see if it stops or not

sirjake · 02-24-2020, 08:04 PM

Thanks all for the help I'll check and see a few things once back from vacation.

I do need to reconfigure it for the new battery. Maybe its caused by that?

sirjake · 03-10-2020, 07:46 PM

So had a few minutes to kill today and thought I would see how the car is running. Made the same noise after a bit. Popped open the hood took the water cap off and could see the water being pumped around until the noise stopped.

So looks like this is from the water pump itself. Now I guess the question is it on it's way out or could this be from the new battery installed or some other issue vs the pump going bad?
I believe it was replaced around 60k miles ago.
I do a lot of 600 mile road trips normally so would rather fix anything that might be breaking sooner than later however not sure if this means it's dying or just running when it shouldn't.

NinetyEight740 · 03-10-2020, 08:45 PM

Just replace it. Those water pumps fail usually with no warning. 50k mile interval for me personally.

02-19-2020, 04:42 PM	#1
sirjake Private 8 Rep 58 Posts Drives: 2011 335xi Join Date: Apr 2015 Location: Seattle WA iTrader: (0) Garage List 2011 BMW 335xi (E92) [0.00]	2011 E92 weird noise under hood Hello there, I've got this weird noise that happens when the car is first opened and when shutting the car off and getting out lasts for a few minutes. I made a quick video of it. BMW said it was the coolant pump and it needs to be replaced, however seems a little odd if that kicks on when just opening the door. Thanks for any help or suggestions.
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02-20-2020, 09:48 AM	#2
sirjake Private 8 Rep 58 Posts Drives: 2011 335xi Join Date: Apr 2015 Location: Seattle WA iTrader: (0) Garage List 2011 BMW 335xi (E92) [0.00]	Anyone have some ideas on this weird noise? Going to try and take a closer look at it later today if I have time, however hopefully not the first person with this weird noise issue.
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02-20-2020, 09:52 AM	#3
IllSic_Design Colonel 2123 Rep 2,758 Posts Drives: 09 E92 335i Join Date: Jun 2016 Location: Northern California iTrader: (1)	Definitely does sound like the water pump. Have you scanned for any pending codes?
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02-20-2020, 09:52 AM	#4
relative4 Major 611 Rep 1,272 Posts Drives: '08 335xi E90 MT stage 1+ Join Date: Feb 2019 Location: Denver, CO iTrader: (0)	Pull the codes. Use a mechanic's stethoscope.
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02-20-2020, 10:02 AM	#5
delmarco Major 494 Rep 1,416 Posts Drives: 2011 335xi Deep Sea Blue Join Date: Jul 2009 Location: Westchester County, NY iTrader: (1)	A failing Waterpump sounds more like a heavy deep fan (sort of like an idling UPS truck). This is more of a buzzing electrical sound. I don't get why it only happens when the door is opened though. Could be battery related or belt and pulley system related. __________________ VISIT MY GARAGE TO SEE MY BMW E90 MODS: http://directory.e46fanatics.com/use...Mod&UcId=20832
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02-20-2020, 10:16 AM	#6
neilvan Major 858 Rep 1,363 Posts Drives: 09 E90 335i M-Sport 6MT RWD Join Date: Nov 2017 Location: Ontario, Canada iTrader: (0) Garage List 2007 BMW E61 530xi [0.00] 1993 Mazda Miata [0.00] 2009 BMW E90 335i [0.00]	Had the issue on my E60(n52) that the waterpump was always running. Try unplugging it, and see if it stops or not
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02-24-2020, 08:04 PM	#7
sirjake Private 8 Rep 58 Posts Drives: 2011 335xi Join Date: Apr 2015 Location: Seattle WA iTrader: (0) Garage List 2011 BMW 335xi (E92) [0.00]	Thanks all for the help I'll check and see a few things once back from vacation. I do need to reconfigure it for the new battery. Maybe its caused by that?
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03-10-2020, 07:46 PM	#8
sirjake Private 8 Rep 58 Posts Drives: 2011 335xi Join Date: Apr 2015 Location: Seattle WA iTrader: (0) Garage List 2011 BMW 335xi (E92) [0.00]	So had a few minutes to kill today and thought I would see how the car is running. Made the same noise after a bit. Popped open the hood took the water cap off and could see the water being pumped around until the noise stopped. So looks like this is from the water pump itself. Now I guess the question is it on it's way out or could this be from the new battery installed or some other issue vs the pump going bad? I believe it was replaced around 60k miles ago. I do a lot of 600 mile road trips normally so would rather fix anything that might be breaking sooner than later however not sure if this means it's dying or just running when it shouldn't.
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03-10-2020, 08:45 PM	#9
NinetyEight740 Major General 231 Rep 5,691 Posts Drives: 2 - 2013 535i msport Join Date: Nov 2008 Location: Orange County California iTrader: (2) Garage List 2010 E91 [0.00]	Just replace it. Those water pumps fail usually with no warning. 50k mile interval for me personally.
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