I was doing a Valve adjustment on my Civic Si @ 184780 Miles.The Exhaust Camshaft seems a little worn but I’m concerned if this wear on it is not normal . Im not sure if its the first time . I got the car last year and the Maintenance manual doesn’t say anything about a Valve adjustment at 100k. I didn’t see anything as noticeable as this on the intake cam. 2012 Sedan. Any idea if its Okay? Should i worry at all?