I slept on it and examined the flakes some more. There are some that are not magnetic and break like melted plastic / have a white-ish color to them.

there are some metallic flakes that appear to not be magnetic.

The other thing is, this car was in an accident and the A/C compressor was hit just enough to crack the block in the front near the chain. This was minor and the shop repaired it. But coudn't metal from the block have gotten in there while the engine was running after the accident and seized a bearing .. perhaps momentarily?

The oil cooler was destroyed as well - oil starvation?

What are the chances it was a fluke and the bearing is turning correctly now?

Will a stethoscope help me determine what is going in there accurately enough?

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