I'd check the oil pump. I can imagine the impellers and end plates being scored badly. Those shavings went through your oil pump first if they ended up in the filter.
Could be a source of the whining.
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2018 F30 320iX Melbourne Red
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red
2000 E36/7 Z3 Steel Blue
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