What are these? (found in oil pan; pics)

[kc92awd]

I found these in my oil pan after hearing a lot of clunking that sounded like rod knock. These are NOT pieces of rod or main bearings. All of the rod and main bearings are still in tact.

I don't see anything else that looks broken or missing. Any ideas?

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[TunaTalon]

You didn't mention that your balance shaft bearings were still intact.
In the 4G63 the balance shaft bearings are inclined to wear out before the main or rod bearings.

 

[kc92awd]

Thanks! I didn't even think of balance shaft bearings. I'll check that out.