What did BMW do wrong with the rod bearings on Exx engine?

Bimmer me up · 01-21-2018, 06:32 PM

Most people on this thread say change out the rod bearing ASAP or risk high chance of engine failure. What did BMW do wrong with this engine and why haven't they come-out with a correction campaign or fix like they did for 550 engine? Is there a thread w stats. for % of failed engines? I have seen pictures of replaced bearings and they look bad....

pbonsalb · 01-21-2018, 06:45 PM

There may be a thread already on this subject that you could read.

///M Power-Belgium · 01-21-2018, 06:47 PM

Quote:

Originally Posted by Bimmer me up

Most people on this thread say change out the rod bearing ASAP or risk high chance of engine failure. What did BMW do wrong with this engine and why haven't they come-out with a correction campaign or fix like they did for 550 engine? Is there a thread w stats. for % of failed engines? I have seen pictures of replaced bearings and they look bad....

That's the billion dollar question ! Here is the Bimmerpost list (not worldwide) => http://www.m3post.com/forums/showthread.php?t=786615

EDIT : It's not only our S65 engines ,the S85 engine is also affected in worldwide bearing failures .

eatsleepboost · 01-21-2018, 06:47 PM

http://www.m3post.com/forums/showthr...253084&page=23

drrust · 01-21-2018, 06:48 PM

Officially there is "No Problem" so BWM has not published what the true root cause is. The increase in clearance may or may not be a solution. Prior to the increased clearance theory, many bearing sets were replaced with WPC treated surfaces. One does not hear of those sets failing.

One wonders if someone in the assembly process took a short cut, in the torquing process or just a design short coming. Now there is some speculation on the rods, but there in no hard data. It would seem to be a great computer modeling project!

Kamen · 01-21-2018, 08:53 PM

Is this for real? Like the other few tens of topics aren't enough.

Bimmer me up · 01-21-2018, 09:38 PM

Quote:

Originally Posted by Kamen

Is this for real? Like the other few tens of topics aren't enough.

Just bought a M3 and had read that I need to change my rod bearings. I just wondered why and did not see what happened and why BMW has done nothing in the threads I have read up to now. I will read the threads provided in answer to my question as apparently they contain more detail and background than...change your rod bearings or your engine will destruct.

6ixSpd · 01-21-2018, 11:25 PM

shimmy23 · 01-22-2018, 12:11 AM

Quote:

Originally Posted by 6ixSpd

Dilly dilly

01-21-2018, 06:32 PM	#1
Bimmer me up New Member 2 Rep 10 Posts Drives: 2011 M3 E93 6MT&2008 535xi 6MT Join Date: Jan 2018 Location: Rhode Island iTrader: (0)	What did BMW do wrong with the rod bearings on Exx engine? Most people on this thread say change out the rod bearing ASAP or risk high chance of engine failure. What did BMW do wrong with this engine and why haven't they come-out with a correction campaign or fix like they did for 550 engine? Is there a thread w stats. for % of failed engines? I have seen pictures of replaced bearings and they look bad....
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01-21-2018, 06:45 PM	#2
pbonsalb Lieutenant General 5234 Rep 10,616 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	There may be a thread already on this subject that you could read.
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01-21-2018, 06:47 PM	#4
eatsleepboost Captain 420 Rep 656 Posts Drives: Evo Join Date: Aug 2017 Location: Boston iTrader: (1)	http://www.m3post.com/forums/showthr...253084&page=23
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01-21-2018, 06:48 PM	#5
drrust Captain 336 Rep 724 Posts Drives: E90 M3 DCT Sedan Join Date: Jun 2016 Location: Cincinnati iTrader: (0)	Officially there is "No Problem" so BWM has not published what the true root cause is. The increase in clearance may or may not be a solution. Prior to the increased clearance theory, many bearing sets were replaced with WPC treated surfaces. One does not hear of those sets failing. One wonders if someone in the assembly process took a short cut, in the torquing process or just a design short coming. Now there is some speculation on the rods, but there in no hard data. It would seem to be a great computer modeling project!
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01-21-2018, 08:53 PM	#6
Kamen Private First Class 70 Rep 162 Posts Drives: BMW M3 E92 Join Date: May 2016 Location: Las Vegas iTrader: (0)	Is this for real? Like the other few tens of topics aren't enough.
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01-21-2018, 11:25 PM	#8
6ixSpd Save the manuals! 6016 Rep 6,747 Posts Drives: '16 M3, '23 718 Spyder Join Date: Feb 2016 Location: 416 iTrader: (4)	__________________ '16 M3 \| '23 718 Spyder Past: E92 M3, F87 M2, E39 M5, etc
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