In Reply to: F150 clatter/new wrinkle posted by lonestarjeff on December 05, 2018 at 22:53:25:
I had the 4.6 triton V8 in my 98 and it did that plus a puff of blue smoke on cold start. I was told it was worn valve guides. I traded at 220k miles. It was lowest maintenance cost truck Iíve had.