Sounds like a chain clattering??How many of you guys with the 3.5 Ecoboost have had cam phaser issues? Today it made a slight rattle noise on startup which went away after 5 seconds at most.
Like gear teeth are missing the chain lightly
Im surprised it STILL is a problem. Mines a 2013 I bought new and had the TDP done around 59,000 under warranty. It did that from day 1, and never had any real issues but I took the free replacements and never did it again
boggles the mind that a decade later they have not changed suppliers to the newer style