Rod bearing failure 2012 E92 M3 56,000 miles

[Ruebsteak]

FYI, Other than #2 & #6, I have not further inspected any of the rods/ bearings. I have been preparing to remove the engine/ DCT. I'm close and will post loads of photos once I do.

Attached are a series of additional photos including bearing shells and other remains extracted with a magnet.

I was thinking of sending a very concentrated sample of the oil to Blackstone, just to see how they respond...

[Brandoch]

Wow! That is all.

[Ruebsteak]

Originally Posted by Brandoch

Wow! That is all.

Effed Up! Yes it is!

[BPMSport]

Originally Posted by Green-Eggs

The ECU has cold-start abuse protection built in. If it were a warm-up issue, then BMW could have updated the ECU software to fix it by making the abuse protection more conservative. This has been discussed for years, and not a single person has tried to explain that, or provide any real evidence to the contrary. In fact, not a single person has even had the guts to say the cold-start abuse protection is somehow broken.

The protection still allows revving to 6,500 when pretty much dead cold, which I would presume could potentially cause unfavorable wear. This is why we introduced the enhanced rev limit protection feature which reduces that to 4,500 and then releases the redline more slowly as a function of oil temp, to allow the oil to reach proper temperature/viscosity.

[Green-Eggs]

Originally Posted by BPMSport

The protection still allows revving to 6,500 when pretty much dead cold, which I would presume could potentially cause unfavorable wear. This is why we introduced the enhanced rev limit protection feature which reduces that to 4,500 and then releases the redline more slowly as a function of oil temp, to allow the oil to reach proper temperature/viscosity.

Yes, I remember you did this. I think that's pretty cool and a great idea. I think if it were the real source of significant bearing wear, BMW could have done it themselves as well. For me, that's what I was trying to say.