bad cam lobe
#2
There is a TSB for this
I found a TSB in the Bentley manual, tsb number 15 08 15 2016717/3. It shows cam lobe wear similar to the picture you have. They have no cause, but say to replace the affected cams. You may be able to get the dealer to cover some of it, call them and ask, the worst they could say is no.
#4
oil change 400 miles ago/full syn.--dealer.i guess the previous owner went cheap on oil.ha ha ha .they saved i,ll spend.not so bad about $300 on a cam and about 150 for all 6 intake followers.good think i can do it my self don,t wanna guess what the dealer,s estimate would it be.