It looks like something got under the cap and ate a couple mm deep gouge into the cam and into the journal. It did not effect the cap because they have an oil valley built into the exact spot whatever made it in sat. Maybe 3 oil changes ago I saw some aluminum sparkles, nothing crazy but I cut up the filter and checked rod bearings and all looked fine. Never noticed anything after that until I pulled the cams yesterday, maybe 5k miles since I saw the sparkles. This is the 1st time I've pulled the cam caps since getting the car a little over a year ago. Prior to that it was never opened because it's a Dankai1 CS block and the guy who sold it to me kept records of everything and owned the shop that performed the work and has kept in touch with me since buying the car. He put about 20k on the motor before I got it.