2011 mini Cooper non turbo P0011 over advanced, p0012 over retarded FIXED .. rectangle rings!!

2011 mini came in with codes p0011 p0012 and will not go away.. swapped timing set , changed variable Timing solenoid from intake to exhaust and the codes will instantly pop back on, swapped cam position sensors and nothing changed, changed no return oil valve and it didn't change. I had checked the rectangle rings from the beginning but they were not snapped and seems fine but were the only thing I could think of being the issue after removing timing again I checked the caps and rubbed them on and noticed they were a bit wore out I called the dealer and had them ordered part number ( 11317587757) they are the same for intake and exhaust in total there's 4 of them. After installing them and putting everything back together the codes went away and have not come back. I hope this is helpful if you have any questions please feel free to ask.