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Rod bearings aren't supposed to be making contact with the journals, so there shouldn't be any metal in the oil from bearings. I'm saying that when looking at oil you can't differentiate between metal coming from a bearing from metal from cylinder bores, timing components, or anything else in the engine. A metallic sheen in the oil with some micro particles of metal are pretty normal. But again, if there are shavings large enough to pick out of the oil that's never good. There's no way to tell where they're coming from without disassembly.
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