I'm having the exact same issue and played the mp3 file posted on this thread and it sounds dead on. I didn't even notice it until I read this thread. I said something to my SA (also referenced the service bulletin) and he said that he noticed it when I brought it in last week for something else. He said that he's going to take a look. I'm taking it in on Monday.
So is the fix for this head replacement or HVA exhaust lifters replacement or both?
