Quote:
Originally Posted by albertw
You keep repeating your position in greater detail without addressing my question. If the oil filter is undamaged and not plugged, how does the metal get past it and into the rest of the engine?
Since you refuse to answer that question, I suspect you are just repeating stuff you've heard and don't understand.
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Spin a rod bearing and metal can go through the crank oil galleys. That metal might stay there and get dislodged later and take out another rod bearing. There's also the oil bypass valve. It's possible it opened during the spun rod bearing event. In that case, metal is going everywhere in the motor.
Most any engine builder would say to properly repair a motor with a spun rod bearing, you need to disassemble it fully and clean the block, head, crank and inspect the turbo. Or you replace the short block, clean the head, and inspect the turbo. Or replace with a new or used motor.
If you want to fix the issue with the original engine block, then the block and crank must be removed and fully inspected, the crank likely fixed, the rod replaced, the piston and rings replaced, the oil pump and pick up replaced, and everything cleaned thoroughly. That's a CRAP TON of work. Only a very skilled DIYer or someone with deep pockets and hopes and dreams would do such a thing vs just replacing with a used motor. Either way, the motor has to come out and you're in it for 5 figures. It's stupid expensive, but a reality with a BMW.