I spoke with the shop this afternoon, their feeling is that the source of the metal flakes was the pitting of the inside surface of the IMS flange, as seen in the photos below. Nevertheless, I will continue to check the magnetic drain plug and oil filter, each time I change the oil.
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1975 Porsche 914
1997 Porsche 986
Last edited by ubii; 09-15-2011 at 05:20 PM.
Reason: changed photos
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