That helped a bit but still have tapping, then they recommend adjustment zero lash and go one full turn, I tried that and still have some tapping, it was a small improvement.
Could be a bad lifter right out of the box.
I was just going to suggest that. He needs to re-lash all of them and run it. If it keeps making noise again re-lash and write down which ones changed. If this keeps happening on the same one or more there could be a cam and lifter failure.
