s65 engine noise

E90_Dave · 04-04-2019, 09:23 PM

Curious of you guys thoughts my m3 just started making this noise, my rod bearing have been done already within the last 5k miles. Anyone have this issue and get it resolved or know what it could be? youtube link below

Helmsman · 04-05-2019, 06:57 AM

Hey Dave, not sure what to listen after mate but if the ticking its injectors sounding nice in my ears. Seems you're filming from top, I'd listen in the bottom if you search for bearing noise. There is a very low "gluck" sound, is that what you mean?

E90_Dave · 04-05-2019, 09:15 AM

Quote:

Originally Posted by Helmsman

Hey Dave, not sure what to listen after mate but if the ticking its injectors sounding nice in my ears. Seems you're filming from top, I'd listen in the bottom if you search for bearing noise. There is a very low "gluck" sound, is that what you mean?

Sounds almost like a light thudding noise that can be heard when the car is up to temp I'll try to add another link to hear the noise more clearly

E90_Dave · 04-05-2019, 12:12 PM

Quote:

Originally Posted by Helmsman

Hey Dave, not sure what to listen after mate but if the ticking its injectors sounding nice in my ears. Seems you're filming from top, I'd listen in the bottom if you search for bearing noise. There is a very low "gluck" sound, is that what you mean?

sounds like this

E90_Dave · 04-06-2019, 09:30 PM

So no one has ever heard this noise ??

LuckiSevens · 04-06-2019, 09:40 PM

Quote:

Originally Posted by E90_Dave

Curious of you guys thoughts my m3 just started making this noise, my rod bearing have been done already within the last 5k miles. Anyone have this issue and get it resolved or know what it could be? youtube link below

Yeah it's deep down in the bowels, you can hear it's a low revolution heavy piece on idle - could it be the fly wheel or main bearing

dv13 · 04-07-2019, 02:14 PM

I’ve heard it as well on my e90 m3. At first I thought it might be rod bearing related but it seems more prevalent on idle and doesn’t have the higher pitched fluttering on rev to 2.5-3k that seems to characterize the bearing noise.

This noise is lower pitched and almost sounds as though something is loose and needs to be torqued down. The second video posted in the thread is perfect in tone, frequency, and location (seems to be low and just drivers side of central on mine as well). The noise doesn’t go away with engaging the clutch on my manual. Could it be fan belt/accessory related?

Scrippy · 04-07-2019, 02:19 PM

How are your motor mounts?

LuckiSevens · 04-08-2019, 02:39 PM

Quote:

Originally Posted by E90_Dave

Curious of you guys thoughts my m3 just started making this noise, my rod bearing have been done already within the last 5k miles. Anyone have this issue and get it resolved or know what it could be? youtube link below

I think it's the clutch, is yours an MT?

E90_Dave · 04-08-2019, 05:52 PM

Quote:

Originally Posted by LuckiSevens

Quote:

Originally Posted by E90_Dave

Curious of you guys thoughts my m3 just started making this noise, my rod bearing have been done already within the last 5k miles. Anyone have this issue and get it resolved or know what it could be? youtube link below

I think it's the clutch, is yours an MT?

Cars a dct car. Perfect engine mounts. Not sure if it could've been main bearings or possibly something else.

mapster37 · 04-08-2019, 06:54 PM

does the frequency of the noise increase with increase of rpms?

LuckiSevens · 04-09-2019, 07:39 PM

Quote:

Originally Posted by mapster37

does the frequency of the noise increase with increase of rpms?

It's the flywheel bearing, watch this vid, when he rocks the clutch and flywheel at 18secs it creates that echoing knocking sound, which is exactly the same noise as the examples above. makes sense since it's located in a hollow chamber (ie. the bell chamber).

superbang · 09-08-2019, 03:30 AM

Reviving for update...

Has anyone figured out the cause of this sound? I had the rod bearings go out before so I know it's not that sound. New engine has just over 35k miles and now im starting to hear the same low thud sound in idle. It's keeping me up at night since I'm out of warranty period.

///M Power-Belgium · 09-09-2019, 04:02 PM

Quote:

Originally Posted by superbang

Reviving for update...

Has anyone figured out the cause of this sound? I had the rod bearings go out before so I know it's not that sound. New engine has just over 35k miles and now im starting to hear the same low thud sound in idle. It's keeping me up at night since I'm out of warranty period.

What was wrong with your first (old) engine ?

superbang · 09-12-2019, 11:15 AM

Quote:

Originally Posted by ///M Power-Belgium

What was wrong with your first (old) engine ?

Rod bearings went out at 69k miles.

///M Power-Belgium · 09-12-2019, 11:20 AM

Quote:

Originally Posted by superbang

Rod bearings went out at 69k miles.

So....Actually you got bearing failure ?

superbang · 09-14-2019, 01:14 PM

Quote:

Originally Posted by ///M Power-Belgium

So....Actually you got bearing failure ?

Yes....I had rod bearing failure that led to total engine loss and had it replaced. Now the new engine at 35k miles has the same sound herd in the video that the op posted. Deep down you can hear the thud thud at idle.

Just for info my friend in his e60 m5 also had rod bearing failure and had to replace his whole engine. I believe his motor was at 90k when it happened

///M Power-Belgium · 09-14-2019, 03:11 PM

Quote:

Originally Posted by superbang

Yes....I had rod bearing failure that led to total engine loss and had it replaced. Now the new engine at 35k miles has the same sound herd in the video that the op posted. Deep down you can hear the thud thud at idle.

Just for info my friend in his e60 m5 also had rod bearing failure and had to replace his whole engine. I believe his motor was at 90k when it happened

OK. Understood . I just added you to the list => https://www.m3post.com/forums/showth...86615&page=111

Thank you for the information. I'm sorry for your loss ..

Ximian · 09-14-2019, 11:58 PM

Quote:

Originally Posted by superbang

Reviving for update...

Has anyone figured out the cause of this sound? I had the rod bearings go out before so I know it's not that sound. New engine has just over 35k miles and now im starting to hear the same low thud sound in idle. It's keeping me up at night since I'm out of warranty period.

Sounds like my engine when using Liqui Moly oil. I would try a different oil with the next change to see if there are any differences.

superbang · 09-26-2019, 09:04 PM

Quote:

Originally Posted by Ximian

Sounds like my engine when using Liqui Moly oil. I would try a different oil with the next change to see if there are any differences.

Will give that a try. That's for the reply.

Assimilator1 · 03-29-2020, 07:19 AM

Any update on your engine?

Avetiso · 12-03-2022, 11:19 PM

Does anyone know what this noise is? My car has it at 78k miles. I did the rod bearings on the car at 76k, the noise didn't change. Engine mounts are new.

04-04-2019, 09:23 PM	#1
E90_Dave White E90 compack 8 Rep 24 Posts Drives: White red Novillo leather E90 Join Date: Oct 2018 Location: San diego iTrader: (0)	s65 engine noise Curious of you guys thoughts my m3 just started making this noise, my rod bearing have been done already within the last 5k miles. Anyone have this issue and get it resolved or know what it could be? youtube link below
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04-05-2019, 06:57 AM	#2
Helmsman Major General 4465 Rep 7,109 Posts Drives: 2011 AW E90 M3 ZCP Join Date: Mar 2014 Location: Stockholm, Sweden iTrader: (0)	Hey Dave, not sure what to listen after mate but if the ticking its injectors sounding nice in my ears. Seems you're filming from top, I'd listen in the bottom if you search for bearing noise. There is a very low "gluck" sound, is that what you mean?
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04-06-2019, 09:30 PM	#5
E90_Dave White E90 compack 8 Rep 24 Posts Drives: White red Novillo leather E90 Join Date: Oct 2018 Location: San diego iTrader: (0)	So no one has ever heard this noise ??
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04-07-2019, 02:14 PM	#7
dv13 New Member 11 Rep 19 Posts Drives: 2011 e90 m3 Join Date: Mar 2017 Location: NOVA iTrader: (0)	I’ve heard it as well on my e90 m3. At first I thought it might be rod bearing related but it seems more prevalent on idle and doesn’t have the higher pitched fluttering on rev to 2.5-3k that seems to characterize the bearing noise. This noise is lower pitched and almost sounds as though something is loose and needs to be torqued down. The second video posted in the thread is perfect in tone, frequency, and location (seems to be low and just drivers side of central on mine as well). The noise doesn’t go away with engaging the clutch on my manual. Could it be fan belt/accessory related?
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04-07-2019, 02:19 PM	#8
Scrippy Lord Scrip 1812 Rep 3,013 Posts Drives: 2011 M3 Coupe Join Date: Jan 2012 Location: LA,Ca iTrader: (0) Garage List [0.00] 2007 BMW 335i [0.00]	How are your motor mounts? __________________
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04-08-2019, 06:54 PM	#11
mapster37 Captain 362 Rep 924 Posts Drives: F80 Join Date: Sep 2018 Location: Davie iTrader: (2)	does the frequency of the noise increase with increase of rpms?
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09-08-2019, 03:30 AM	#13
superbang Enlisted Member 9 Rep 35 Posts Drives: 2008 335i Join Date: Aug 2013 Location: Long Beach iTrader: (0)	Reviving for update... Has anyone figured out the cause of this sound? I had the rod bearings go out before so I know it's not that sound. New engine has just over 35k miles and now im starting to hear the same low thud sound in idle. It's keeping me up at night since I'm out of warranty period.
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03-29-2020, 07:19 AM	#21
Assimilator1 Major 593 Rep 1,026 Posts Drives: BMW M3 e92 08 & 330d e90 10 Join Date: Sep 2019 Location: UK, Surrey iTrader: (0) Garage List 2010 BMW 330d [8.00] 2008 BMW M3 [0.00]	Any update on your engine? __________________ . Oil analysis for finding wearing rod bearings?. Collation of oil analysis reports with some rod bearing photos for the M3's S65. My categorisation of pulled rod bearings in the rod bearing condition thread. My updated 'Blown engines' list.
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12-03-2022, 11:19 PM	#22
Avetiso New Member 13 Rep 29 Posts Drives: 2008 E90 M Join Date: Jul 2014 Location: Salt Lake City, UT iTrader: (0)	Does anyone know what this noise is? My car has it at 78k miles. I did the rod bearings on the car at 76k, the noise didn't change. Engine mounts are new.
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