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      01-18-2018, 05:58 PM   #1
Mcouple
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Another Rod bearings thread: is there less of a failure rate with the aluminum bearin

BMW changed the rod bearings for the 2013 e92 M3 from copper to aluminum from what I understand. Please correct me if I am wrong on this. This is at least what I was told when I bought my car 5 years ago. Does anyone know if the 2013 e92 M3 aluminum rod bearings have less of a failure rate than their copper counter parts? Are the aluminum bearings more durable as a result?
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      01-18-2018, 06:00 PM   #2
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Nope. Same shit, different material.
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      01-18-2018, 06:11 PM   #3
carenthuziast
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Not only is the bearing material different, but also the eccentricity of the curve. There's more space now for oil to penetrate into the bearing. The new bearing material is also harder.
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      01-18-2018, 06:11 PM   #4
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The change was to comply with a ban on the use of lead. No change in clearance or reliability on these motors. But only a small percentage of S65s have failed so far, regardless of bearing material. I changed my bearings years ago, but many do not bother.
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      01-18-2018, 07:27 PM   #5
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Everything you could ever want to know about bearings. Of course when you are done reading all 22 + pages you will have more questions, as we all do.

Official S65 Rod Bearing Condition Example Thread http://www.m3post.com/forums/showthread.php?t=1253084
      01-18-2018, 09:16 PM   #6
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Thank you all for your help and information. Much appreciated.
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      01-18-2018, 09:40 PM   #7
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Quote:
Originally Posted by roastbeef View Post
Nope. Same shit, different material.
^^This. Nobody is immune.

My '13 e92 with 29,9XX mi just went in this morning for rod bearing replacement, oil analysis showed plenty of metal. Shop said their first analysis is that it was typical rod bearing wear, but of course the engine wasn't quite apart yet so fingers crossed that's all it is.

Will post back when I know more.

I think the bottom line is that eventually it will happen. Check your oil every time you change it, and get a proper analysis. While it's clean, enjoy the damn car and when it shows wear, replace them. Some last longer than others, driving habits etc make a difference. Appears the previous owner could have done a better job in my case. There seems to be some rare, but VERY scary and unfortunate stories of catastrophe early and without warning signs or detection at all.....but I do think that is really rare. My shop has done lots of these, and still services the same vehicles many miles later and get blackstone reports every time. They are convinced it is a one time fix, and I will say that I am sure looking forward to the piece of mind the next time I step in it.
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      01-18-2018, 09:57 PM   #8
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Quote:
Originally Posted by GOFAST M3 View Post
^^This. Nobody is immune.

My '13 e92 with 29,9XX mi just went in this morning for rod bearing replacement, oil analysis showed plenty of metal. Shop said their first analysis is that it was typical rod bearing wear, but of course the engine wasn't quite apart yet so fingers crossed that's all it is.

Will post back when I know more.

I think the bottom line is that eventually it will happen. Check your oil every time you change it, and get a proper analysis. While it's clean, enjoy the damn car and when it shows wear, replace them. Some last longer than others, driving habits etc make a difference. Appears the previous owner could have done a better job in my case. There seems to be some rare, but VERY scary and unfortunate stories of catastrophe early and without warning signs or detection at all.....but I do think that is really rare. My shop has done lots of these, and still services the same vehicles many miles later and get blackstone reports every time. They are convinced it is a one time fix, and I will say that I am sure looking forward to the piece of mind the next time I step in it.
I was under the impression that later gen E9X M3ís (with the new harder material) could not be tracked through Blackstone oil analysis? Ie since no lead/metal etc it canít read if there is a problem or not.
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      01-18-2018, 10:24 PM   #9
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My '11.5's bearings.
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      01-18-2018, 10:51 PM   #10
pbonsalb
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Quote:
Originally Posted by FrozenAg View Post
I was under the impression that later gen E9X M3ís (with the new harder material) could not be tracked through Blackstone oil analysis? Ie since no lead/metal etc it canít read if there is a problem or not.
We all wish there was some simple and reliable way to determine whether we need new bearings. There is not. People who have used Blackstone have had failures. The only way I would rely on it is if I owned the car from new and tested from new.
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      01-18-2018, 11:33 PM   #11
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Quote:
Originally Posted by roastbeef View Post
Nope. Same shit, different material.
I loved Will Smith from BBII.
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