Blown motors, Rod Bearing failure S65 Registry.

[SYT_Shadow]

If you have over 100k I would replace the bearings even if the car doesn't have specific rod bearing issues.
It's a 8400rpm engine!

[deansbimmer]

Engines failing with replaced bearings doesn't point at the bearings. How much evidence is there? Was it the mains that actually failed? Who did the job? What are their credentials? What bearings were used? What rod bolts were used? Was their torque wrench calibrated? Was final clearance measured? How was the car maintained afterwards? Too many questions without a qualified autopsy.

I also find something suspicious about one owner going through multiple S65's. Something isn't right in an environment like that. These engine's aren't that fragile.

[///M Power-Belgium]

Originally Posted by byroncheung

Are we talking about bearings with extra clearance or oem clearances?

The replaced bearings had extra clearance .

[330ciprem]

We can't conclude anything without a proper engine teardown.

Still, if the shop messed up the assembly then that would be an even harder thing to find out.

[Scharbag]

Originally Posted by 330ciprem

We can't conclude anything without a proper engine teardown.

Still, if the shop messed up the assembly then that would be an even harder thing to find out.

And typically, assembly mistakes would show up sooner than later.

[wyatth]

How many instances of BE bearing failures?

[Ngilbe36]

Originally Posted by ///M Power-Belgium

The replaced bearings had extra clearance .

I thought the early BE bearings did not have the increased clearance and it was a Gen2 version that it was increased. I could be wrong.

[///M Power-Belgium]

Originally Posted by Ngilbe36

I thought the early BE bearings did not have the increased clearance and it was a Gen2 version that it was increased. I could be wrong.

His bearings are replaced in August 2017 . So they had the extra clearance.

[tdott]

Originally Posted by Ngilbe36

I thought the early BE bearings did not have the increased clearance and it was a Gen2 version that it was increased. I could be wrong.

You thought wrong, BE always had extra clearance.
But they also offer standard clearance bearings which you have to specifically order, meant for complete rebuilds where the crank is machined or blueprinted spec'ed.

The fact that the motor had BE bearings means nothing at this point until there is a tear down and analysis.

[tdott]

Originally Posted by ///M Power-Belgium

Lately I noticed bearing failures with replaced bearings , and that's really bad news..

1 failure is really bad news? It's not even torn down to determine the cause as yet.

How many others were there? 1 Main bearing failure and 1 assembly issue is all I can remember seeing. Hardly any cause to overreact.

[///M Power-Belgium]

Originally Posted by tdott

1 failure is really bad news? It's not even torn down to determine the cause as yet.

How many others were there? 1 Main bearing failure and 1 assembly issue is all I can remember seeing. Hardly any cause to overreact.

I did not mentioned any numbers . I talked about the situation , and that was definitely bad news .
On the other hand..6 bearing failures (only on Bimmerpost) in barely 10 days is not overreacting .
Meanwhile the Bimmerpost list goes up to number 161...And that's not Worldwide .
No worries man . The S65 bearings are bulletproof !

[tdott]

Originally Posted by ///M Power-Belgium

I did not mentioned any numbers . I talked about the situation , and that was definitely bad news .
On the other hand..6 bearing failures (only on Bimmerpost) in barely 10 days is not overreacting .
Meanwhile the Bimmerpost list goes up to number 161...And that's not Worldwide .
No worries man . The S65 bearings are bulletproof !

They are not bulletproof, I never said they were.
But I think starting to spread fear that aftermarket/replaced bearings are failing is not warranted with the limited number of failures which were not related to the actual bearing themselves so far.

You said you noticed replaced bearing failures........there is no sign of that statement being true.

Your words again:

Originally Posted by ///M Power-Belgium

Lately I noticed bearing failures with replaced bearings , and that's really bad news..

[///M Power-Belgium]

Originally Posted by tdott

They are not bulletproof, I never said they were.
But I think starting to spread fear that aftermarket/replaced bearings are failing is not warranted with the limited number of failures which were not related to the actual bearing themselves so far.

You said you noticed replaced bearing failures........there is no sign of that statement being true.

Your words again:

I don't spread fear . I share evidence ..

[tdott]

Originally Posted by ///M Power-Belgium

I don't spread fear . I share evidence ..

Anecdotal evidence...

You shared no evidence of any motor failing due to the replaced bearings. There have been 2 reported cases on here where a motor failed that had replaced bearings, in both cases the replaced bearings were not the cause of the failure.

The most recent case is not yet conclusive, so I don't think you can count that one as yet.

[///M Power-Belgium]

Originally Posted by tdott

Anecdotal evidence...

You shared no evidence of any motor failing due to the replaced bearings. There have been 2 reported cases on here where a motor failed that had replaced bearings, in both cases the replaced bearings were not the cause of the failure.

The most recent case is not yet conclusive, so I don't think you can count that one as yet.

I share no matter what kind of bearing failure in this thread , because I'm pretty sure BMW can read as well..
In other words , actually it's for good cause and that's better than stabbing our head in the sand .
Worldwide owners are in trouble , or in fear to get in trouble...
The S65 and S85 are not cheap .

[aus]

Originally Posted by ///M Power-Belgium

MikeHawk7 for the list => http://www.m3post.com/forums/showthread.php?p=23224133

Note: He has loud audible rod knock in his videos , he drove only 9K miles with replaced bearings..

Please keep me updated on this one. Once it's confirmed, I'll add him but by the sound of it, it's the bearings.
Thanks for keeping an eye out for more cars to add to the registry.

.

[///M Power-Belgium]

Originally Posted by aus

Please keep me updated on this one. Once it's confirmed, I'll add him but by the sound of it, it's the bearings.
Thanks for keeping an eye out for more cars to add to the registry.

.

OK . Thank you Sir

[Green-Eggs]

Originally Posted by wyatth

How many instances of BE bearing failures?

Due to main bearing failure: one.
Due to assembly error (one shell installed backwards): one.
Due to rod bearings themselves: zero.

[pbonsalb]

Here is one from Bimmerforums in which a BMW dealer in Florida told the owner it is probably rod bearing related knock. No update at the time of this post so the final word is unknown.

https://www.bimmerforums.com/forum/s...knocking-sound

[admranger]

Originally Posted by Green-Eggs

Due to main bearing failure: one.
Due to assembly error (one shell installed backwards): one.
Due to rod bearings themselves: zero.

How the hell do you install a shell backwards? I can't get my head around this for some reason... )( instead of ()? Not trying to be a smartass here. It has been ~18 months since I installed the three sets in my garage so I don't have the details fresh in my head.

[XIX]

Originally Posted by admranger

How the hell do you install a shell backwards? I can't get my head around this for some reason... )( instead of ()? Not trying to be a smartass here. It has been ~18 months since I installed the three sets in my garage so I don't have the details fresh in my head.

I assume he means the top and bottom in the wrong places (top was placed at the bottom ..). Still a monumental failure.

I likewise am yet to see any real evidence of the replaced rod bearings having failed. Though this could be a matter of time, we will just have to wait and see.

I'd love to know how many out there have replaced their 'replaced' bearings and see what the wear is like.

[Green-Eggs]

Originally Posted by admranger

How the hell do you install a shell backwards? I can't get my head around this for some reason... )( instead of ()? Not trying to be a smartass here. It has been ~18 months since I installed the three sets in my garage so I don't have the details fresh in my head.

In an S65 connecting rod, the locater tangs face each other on the same parting line. In the failure case mentioned, one shell was installed with the locater tangs at opposite parting lines. The offending shell locater tang wasn't installed in the connecting rod correctly.

Originally Posted by XIX

I assume he means the top and bottom in the wrong places (top was placed at the bottom ..). Still a monumental failure.

That really wouldn't be a problem IMO. The only difference between a top and bottom shell is 5/10000 of an inch thickness. You'd prefer the thicker shell on top because that's where combustion puts all the pressure. If if tops and bottoms were reversed, it wouldn't be the end of the world.