I know a handful of others have mentioned their 5.0 sounded like it was knocking. Ive made videos of my 5.0 that is exhibiting this sound, and compared it to another 2018 5.0 that seems to be running fine. My truck is currently at the dealer for several repairs. They replaced the cam phasers for the “rattle” not sure if it fixed the issue as I have not gotten my truck back, the dealer is now looking into this knock which they appear to be taking seriously and agree that it does not sound “normal”. I will update this thread when i know more, just hope I can save others trouble down the road if Ford will agree this sound if not “normal” and does something about it.

took a video of the loaner 2018 f150 5.0 I am currently driving, For comparison of the knocking noise my truck is exhibiting. Both trucks were completely warm after 50min drive home from work.

Loaner:

My 2018 f150 5.0:

If you have decent speakers, you can clearly hear what sounds like tapping or knocking in my motor.

interesting, Ive showed this to others including the dealer. Who all agreed mine sounds like there is something going on.

I asked them to cut the oil filter open when I originally dropped it off. It seems they convieniently “forgot” but they do seem like they are trying to get to the bottom of it. If they end up coming back and saying it is normal, i still have quite a bit of warrantly left so i am fine with running it for a couple k and cutting the filter open myself on video to show them.

if I increase the RPM the sound speeds up and slows down.