Quote:
Originally Posted by hassmaschine
yeah but how many of those guys are running double the factory boost levels and beating on it all the time..
Plus it's Facebook. Many in those FB car groups are not exactly the sharpest tools in the shed...
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I am not saying the cars weren't abused. I am saying that N54's, with the exact same rod bearings and .0015" clearance, aren't any different lol.
There are literally people going around claiming N55 has rod bearing issues and N54s don't.
OPs bearings look like WEAR to me. They don't look like a bearing issue (crush, load capacity, journal consistency, etc.). As in, it was caused by long-term oiling issue (dry starts, fuel dilution, OCI, poor oil quality or too thick of an oil, etc.). The leading theory for me now points to dry starts cause more wear over time which is why BMW is using IROX on the upper shells in all of their new motors.
I speculated this months ago that we might see people start to tear down these n5x and find high amounts of bearing wear just like every other BMW engine of the past 2 decades.
fatty335 I would consider using aftermarket bearings like KING. Seems like a huge waste of money to put BMW bearings back in at $30 a shell when you can get the entire set for $26.99. rrrrrr means all standard (yellow) lower shells, right? Doesn't the block tell you what uppers to use? Doesn't seem like you should have any issue using a builder set of bearings and then double checking clearances with plastiguage since all journals are showing as standard bearings. You can use the money savings to get the King bearings treated with this IROX crap.