Weird high pitch sound from engine

dying4004 · 03-02-2019, 09:56 PM

guys

my bmw e90 2010 is making a weird sound for last few months.

most of the times it happens when i start the cat in the morning or when the engine is cold.

i have uploaded a sound file that i recorded if you guys can find any clue from that.

thanks

https://drive.google.com/open?id=1-0...JNIDFmSkkoujB6

Socket · 03-02-2019, 10:09 PM

Sorry no idea but that sounds bad

KingClifton · 03-03-2019, 04:53 AM

Given the age, I'd suggest its the harmonic balancer. I have a 2009 E90 and have had the a high-pitched noise for the last couple of years at least.

The dealer replaced a couple of pulleys to no avail. Next step (according to both the dealer and an independent mechanic) is replacing the harmonic balancer.

dli286 · 03-03-2019, 04:56 AM

Has it gotten worse since then? Any CEL? Have you scanned the ECU?

dying4004 · 03-03-2019, 05:29 AM

Quote:

Originally Posted by dli286

Has it gotten worse since then? Any CEL? Have you scanned the ECU?

it hasnt gotten worse. it seems to be consistent.

i am going to see a mechanic soon.

dying4004 · 03-03-2019, 05:54 AM

Quote:

Originally Posted by KingClifton

Given the age, I'd suggest its the harmonic balancer. I have a 2009 E90 and have had the a high-pitched noise for the last couple of years at least.

The dealer replaced a couple of pulleys to no avail. Next step (according to both the dealer and an independent mechanic) is replacing the harmonic balancer.

is that expensive to replace?

Socket · 03-03-2019, 05:57 AM

I’ll have one up for sale in about a month if you can wait that long or DrJ has a wreck he is parting out. He might have one available

dying4004 · 03-03-2019, 07:04 AM

Quote:

Originally Posted by Socket

I’ll have one up for sale in about a month if you can wait that long or DrJ has a wreck he is parting out. He might have one available

thnx man. lemme see a mechanic at first. lets see what is the actual problem is.

Socket · 03-03-2019, 07:35 AM

Quote:

Originally Posted by dying4004

thnx man. lemme see a mechanic at first. lets see what is the actual problem is.

Very wise but don’t take to dealership, you’ll end up needing a new engine

dli286 · 03-04-2019, 03:36 AM

Quote:

Originally Posted by dying4004

thnx man. lemme see a mechanic at first. lets see what is the actual problem is.

Good luck and keep us posted.

juld0zer · 03-05-2019, 06:10 AM

What engine?
Does it happen more with the front of the car facing downhill?

dying4004 · 03-06-2019, 01:20 AM

Quote:

Originally Posted by juld0zer

What engine?
Does it happen more with the front of the car facing downhill?

its a 323i 3 litre engine

its not limited to facing downhill.

juld0zer · 03-08-2019, 05:11 AM

The audio clip is not great but it sounds more transmission related.
Can you hear it at idle with the car parked? Does the pitch change when you stab the gas pedal quickly or hold revs steady at say 1800rpm?

dying4004 · 04-06-2019, 02:42 AM

went to see a mechanic today and they said its coming from power steering.

they replaced power steering fluid and asked me to monitor.

the sound isn't here anymore but will see how ti goes.

Socket · 04-07-2019, 07:08 PM

Quote:

Originally Posted by dying4004

went to see a mechanic today and they said its coming from power steering.

they replaced power steering fluid and asked me to monitor.

the sound isn't here anymore but will see how ti goes.

Power steering fluid related?
Guess thats possible if the system was leaking and running low

dying4004 · 04-09-2019, 03:48 AM

Quote:

Originally Posted by Socket

Power steering fluid related?
Guess thats possible if the system was leaking and running low

they did not see any leak but they said if the sound comes back then they will need to remove few other components to have a better look at it.

03-02-2019, 09:56 PM	#1
dying4004 Private First Class 10 Rep 149 Posts Drives: BMW 323i 2010 Join Date: May 2015 Location: Sydney iTrader: (0)	Weird high pitch sound from engine - E90 guys my bmw e90 2010 is making a weird sound for last few months. most of the times it happens when i start the cat in the morning or when the engine is cold. i have uploaded a sound file that i recorded if you guys can find any clue from that. thanks https://drive.google.com/open?id=1-0...JNIDFmSkkoujB6
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03-02-2019, 10:09 PM	#2
Socket Lieutenant General 4541 Rep 11,903 Posts Drives: 335i Join Date: Nov 2014 Location: Australia iTrader: (4) Garage List 2008 BMW E92 [0.00]	Sorry no idea but that sounds bad
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03-03-2019, 04:53 AM	#3
KingClifton Private 4 Rep 97 Posts Drives: 2009 320d & 2011.5 X5 30d Join Date: Nov 2008 Location: Adelaide iTrader: (0)	Given the age, I'd suggest its the harmonic balancer. I have a 2009 E90 and have had the a high-pitched noise for the last couple of years at least. The dealer replaced a couple of pulleys to no avail. Next step (according to both the dealer and an independent mechanic) is replacing the harmonic balancer. __________________ 2009 E90 320d M-Sport /// 2011.5 E70 X5 xDrive30d
	Appreciate 1 dying400410.00 Quote

03-03-2019, 04:56 AM	#4
dli286 Private 11 Rep 74 Posts Drives: E92 325 and F87 M2 Join Date: Nov 2014 Location: Melbourne iTrader: (0)	Has it gotten worse since then? Any CEL? Have you scanned the ECU?
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03-03-2019, 05:57 AM	#7
Socket Lieutenant General 4541 Rep 11,903 Posts Drives: 335i Join Date: Nov 2014 Location: Australia iTrader: (4) Garage List 2008 BMW E92 [0.00]	I’ll have one up for sale in about a month if you can wait that long or DrJ has a wreck he is parting out. He might have one available
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03-05-2019, 06:10 AM	#11
juld0zer Lieutenant Colonel 480 Rep 1,600 Posts Drives: Prev 135i 7DCT, Now 130i 6sp Join Date: Jul 2016 Location: 2153 iTrader: (0)	What engine? Does it happen more with the front of the car facing downhill?
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03-08-2019, 05:11 AM	#13
juld0zer Lieutenant Colonel 480 Rep 1,600 Posts Drives: Prev 135i 7DCT, Now 130i 6sp Join Date: Jul 2016 Location: 2153 iTrader: (0)	The audio clip is not great but it sounds more transmission related. Can you hear it at idle with the car parked? Does the pitch change when you stab the gas pedal quickly or hold revs steady at say 1800rpm?
	Appreciate 0 Quote

04-06-2019, 02:42 AM	#14
dying4004 Private First Class 10 Rep 149 Posts Drives: BMW 323i 2010 Join Date: May 2015 Location: Sydney iTrader: (0)	went to see a mechanic today and they said its coming from power steering. they replaced power steering fluid and asked me to monitor. the sound isn't here anymore but will see how ti goes.
	Appreciate 0 Quote

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