Mountain376
Well-Known Member
- Joined
- Nov 17, 2014
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- '17 Camaro SS 1LE, '16 Camaro SS, '12 Mustang GT
The main and rod bearings typically have a base coating of copper. The same goes for camshaft bearings, but some can have a copper outer coating. Piston pin bushings can have copper outer coatings. That's probably where the copper is from (break-in).Certainly there are smarter folk on here that can elaborate on this but my understanding is the main and rod bearings would be the primary source.
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