Possible Rod Bearing Failure

Dr. Dre · 09-15-2018, 06:44 PM

Started the car this morning loud knocking noise. It went away so i thought nothing of it. Moved the car to clean out garage. Started it again to move the car and noticed the noise.

I think I'm screwed. And yes bearings were replaced less than a year ago with less than 3000 miles.

Honda · 09-15-2018, 07:07 PM

I don't hear anything abnormal

monterey · 09-15-2018, 07:25 PM

Doesnt sound good. Bring in for diagnosis quick style.

///M Power-Belgium · 09-15-2018, 07:40 PM

Quote:

Originally Posted by Dr. Dre

Started the car this morning loud knocking noise. It went away so i thought nothing of it. Moved the car to clean out garage. Started it again to move the car and noticed the noise.

I think I'm screwed. And yes bearings were replaced less than a year ago with less than 3000 miles.

Can you post another video while you rev the engine *slowly* up to 3K rpm's ?

MidnightM3 · 09-15-2018, 08:41 PM

Is the car warmed up in this video? It sounds like it's quieting down a bit as the video progresses.

It's normal for the lifters to tick and clickity clack a bit until the car warms up. Yours does sound more pronounced and a little louder then normal here. If it is in fact the rod bearings and you just changed them 3,000 miles ago, I'm lost for words. If to you as the owner it sounds very different then normal then I would take it in and get a diagnosis ASAP.

Linked below is an good write up on the topic (RE: BMW inline six, but still relevant). There are also some good thesis on the possible causes and fixes, as well as reasons due to driving style (i.e. Euro vs. American) which I thought was an interesting POV. Thought this was a pretty good overview and might be relevant here. Curious if the sound goes away when you warm it up a bit more.

https://www.quirkyuncle.com/2013/04/...w-lifter-tick/

What about a video with the hood open capturing sound from both sides of the motor?

Dr. Dre · 09-15-2018, 09:01 PM

Second Vid. Low revs.

Bimmer Barney · 09-15-2018, 10:57 PM

Does sound a little louder than normal but I don’t hear rod knock. It’s really hard to capture accurate sound on a video so take everything we post with a grain of salt and tow it to your shop for inspection. Who did your RB’s and what was the setup you did? Would love to see the RB’s if they come out.

BOOF-M3 · 09-15-2018, 11:01 PM

No one has been more vocal than you Dre about preventive bearing maintenance. I certainly hope that whatever it is, it was just a blip and everything is fine.

Dr. Dre · 09-15-2018, 11:16 PM

Quote:

Originally Posted by BOOF-M3

No one has been more vocal than you Dre about preventive bearing maintenance. I certainly hope that whatever it is, it was just a blip and everything is fine.

I was thinking about the irony of that. But that's life right.

Malek did my bearings. One of the best. Used VAC Motorsports Bearings

DanMpower · 09-15-2018, 11:26 PM

Hmmm... that sounds more like a small exhaust leak than a knocking rod bearing...

Bimmer Barney · 09-15-2018, 11:45 PM

Quote:

Originally Posted by Dr. Dre

I was thinking about the irony of that. But that's life right.

Malek did my bearings. One of the best. Used VAC Motorsports Bearings

Mine too. That should give you some comfort. Maybe give him a ring.

Jhanksm3 · 09-16-2018, 12:06 AM

Hopefully it is nothing major

ItsGary · 09-16-2018, 01:30 AM

Quote:

Originally Posted by RAETD M

Hmmm... that sounds more like a small exhaust leak than a knocking rod bearing...

Yah, it sounds exactly like my car. I believe I have an exhaust leak too, just don't know from where exactly.

m3jala · 09-16-2018, 06:20 AM

Quote:

Originally Posted by RAETD M

Hmmm... that sounds more like a small exhaust leak than a knocking rod bearing...

Unless I am missing something, I second this. Or lifters perhaps.

EnVe46 · 09-16-2018, 08:20 AM

Sounds like an exhaust leak to me. I had one after the shop did some work and I thought for sure I had a bearing issue. We put it on the rack, tightened exhaust and started. Noise gone.

Transfer · 09-16-2018, 11:12 AM

Sounds like an S65? Maybe a little clattery at the valves but nothing crazy sounding to my minimally educated ears.

NoHedge · 09-16-2018, 11:19 AM

Sounds normal to me.. perhaps slightly more audible lifter tick

///M Power-Belgium · 09-16-2018, 12:51 PM

Quote:

Originally Posted by Dr. Dre

Second Vid. Low revs.

There is *NO* Rod knock in your video . Your S65 sounds pretty good

Montaver · 09-16-2018, 02:21 PM

Paranoia

roastbeef · 09-16-2018, 02:22 PM

Replaced with what? Oem?

Dave07997S · 09-16-2018, 06:31 PM

That's doesn't sound like rod knock, sounds like the idler pulley is getting noisy.

Dave07997S · 09-17-2018, 02:23 PM

Any update?

09-15-2018, 06:44 PM	#1
Dr. Dre the doctor 284 Rep 432 Posts Drives: E46 M3 Alpine White Join Date: Dec 2008 Location: CA, Bay Area iTrader: (0)	Possible Rod Bearing Failure Started the car this morning loud knocking noise. It went away so i thought nothing of it. Moved the car to clean out garage. Started it again to move the car and noticed the noise. I think I'm screwed. And yes bearings were replaced less than a year ago with less than 3000 miles.
	Appreciate 1 ///M Power-Belgium63077.00 Tweet

09-15-2018, 07:07 PM	#2
Honda Lieutenant Colonel 289 Rep 1,532 Posts Drives: BMW Join Date: Feb 2014 Location: US iTrader: (25)	I don't hear anything abnormal
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09-15-2018, 07:25 PM	#3
monterey Major 339 Rep 1,239 Posts Drives: 2008 M3 Join Date: Mar 2016 Location: United States iTrader: (1)	Doesnt sound good. Bring in for diagnosis quick style.
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09-15-2018, 08:41 PM	#5
MidnightM3 MidnightM3 39 Rep 211 Posts Drives: BMW E92 M3 Join Date: Jul 2010 Location: USA iTrader: (2)	Is the car warmed up in this video? It sounds like it's quieting down a bit as the video progresses. It's normal for the lifters to tick and clickity clack a bit until the car warms up. Yours does sound more pronounced and a little louder then normal here. If it is in fact the rod bearings and you just changed them 3,000 miles ago, I'm lost for words. If to you as the owner it sounds very different then normal then I would take it in and get a diagnosis ASAP. Linked below is an good write up on the topic (RE: BMW inline six, but still relevant). There are also some good thesis on the possible causes and fixes, as well as reasons due to driving style (i.e. Euro vs. American) which I thought was an interesting POV. Thought this was a pretty good overview and might be relevant here. Curious if the sound goes away when you warm it up a bit more. https://www.quirkyuncle.com/2013/04/...w-lifter-tick/ What about a video with the hood open capturing sound from both sides of the motor? __________________ BMW ESS SC E92 M3 DCT
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09-15-2018, 09:01 PM	#6
Dr. Dre the doctor 284 Rep 432 Posts Drives: E46 M3 Alpine White Join Date: Dec 2008 Location: CA, Bay Area iTrader: (0)	Second Vid. Low revs.
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09-15-2018, 10:57 PM	#7
Bimmer Barney Lieutenant Colonel 1250 Rep 1,502 Posts Drives: 2011.5 E90M ZCP Join Date: Jan 2011 Location: California iTrader: (4)	Does sound a little louder than normal but I don’t hear rod knock. It’s really hard to capture accurate sound on a video so take everything we post with a grain of salt and tow it to your shop for inspection. Who did your RB’s and what was the setup you did? Would love to see the RB’s if they come out. __________________ 2011.5 E90 M3 DCT ZCP Slicktop
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09-15-2018, 11:01 PM	#8
BOOF-M3 Brigadier General 4450 Rep 4,014 Posts Drives: 2011 M3 Join Date: Nov 2014 Location: South Pasadena Florida iTrader: (1)	No one has been more vocal than you Dre about preventive bearing maintenance. I certainly hope that whatever it is, it was just a blip and everything is fine.
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09-15-2018, 11:26 PM	#10
DanMpower Colonel 3231 Rep 2,159 Posts Drives: BMW M3s and a Red VW Join Date: Feb 2018 Location: Southern CA iTrader: (28)	Hmmm... that sounds more like a small exhaust leak than a knocking rod bearing...
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09-16-2018, 12:06 AM	#12
Jhanksm3 Captain 230 Rep 620 Posts Drives: 2023 G80 M3 Comp Join Date: Mar 2011 Location: Charleston SC via Raleigh NC iTrader: (2)	Hopefully it is nothing major
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09-16-2018, 08:20 AM	#15
EnVe46 Major 1038 Rep 1,216 Posts Drives: 11 E90 M3 LeMansBlue Join Date: Nov 2011 Location: Fort Lauderdale, Fl iTrader: (1)	Sounds like an exhaust leak to me. I had one after the shop did some work and I thought for sure I had a bearing issue. We put it on the rack, tightened exhaust and started. Noise gone. __________________ 2011.5 E90 M3 LeMans Blue
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09-16-2018, 11:12 AM	#16
Transfer Major General 5250 Rep 5,874 Posts Drives: Bronco Wildtrak, Tesla MYP Join Date: Mar 2010 Location: Issaquah, WA iTrader: (1)	Sounds like an S65? Maybe a little clattery at the valves but nothing crazy sounding to my minimally educated ears.
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09-16-2018, 11:19 AM	#17
NoHedge Private First Class 68 Rep 192 Posts Drives: E92 M3 \| 991.1 C2S Join Date: Feb 2011 Location: New York iTrader: (0)	Sounds normal to me.. perhaps slightly more audible lifter tick
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09-16-2018, 02:21 PM	#19
Montaver Lieutenant Colonel 2143 Rep 1,647 Posts Drives: 718 GT4 & M340i LCI Join Date: Jul 2017 Location: NY iTrader: (0)	Paranoia
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09-16-2018, 02:22 PM	#20
roastbeef Lieutenant General 11583 Rep 12,723 Posts Drives: E92 M3 Join Date: Nov 2010 Location: Orange County, CA iTrader: (4)	Replaced with what? Oem? __________________ Instagram; @roastbeefmike
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09-16-2018, 06:31 PM	#21
Dave07997S Brigadier General 720 Rep 3,964 Posts Drives: 2020 Ford Mustang GT Join Date: May 2009 Location: El Segundo, CA iTrader: (1)	That's doesn't sound like rod knock, sounds like the idler pulley is getting noisy.
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09-17-2018, 02:23 PM	#22
Dave07997S Brigadier General 720 Rep 3,964 Posts Drives: 2020 Ford Mustang GT Join Date: May 2009 Location: El Segundo, CA iTrader: (1)	Any update?
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