Zavs, it looks like alluminum shavings and some plastic and rtv silicone... Who knows... Im sure whatever it is, it's been replaced or is being replaced... All my bearings looks 100%... Justin saw them today, and he commented how they werent stock Toyota bearings... My feeling is this: I believe this motor WAS rebuilt, however someone along the chain is lying about what was done... Either the shop lied to the previous owner and they never put forged internals in, OR, the previous owner lied to me about the internals... Someone lied, thats all I know for sure... This is one reason why I'll never buy a "built" motor/car again... At least if I ever sell this car, I can show actual pictures of the build process... But I dont think this car will ever be sold