It seems that my 09 F150 has developed a troubling noise... I'm looking for any cam phaser experts who might have some advice. I'm at 116,712mi. 5.4L motor of course.

On cold start, I hear about 2 seconds of "clatter" - sounds like something is "loose" on top of the motor.
At hot idle, I hear the classic "diesel" idle, indicative of the cam phaser issue.
In gear, the rattle intensifies and is very noticeable around 1000RPM.

Other than the noises, the truck runs great - like new.

Here's a video:
https://www.youtube.com/watch?v=ezmJ...outu.be&fmt=22
Under hood, under hood close up, driver's wheel well, interior, then interior in gear. You'll need to crank the volume to hear the last two.

Best I can tell, this is not an exhaust manifold issue.

So, what say you? Cam phasers?

 

Your engine sounds normal to me (in fact, sounds exactly like mine). All I hear is the sounds of the phasers and the fuel injection. Here's a comparison video of one that sounds bad and has bad cam phasers, yet starts normal: