Originally Posted by Lead Head
It was probably just a 5.4 with bad cam phasers. They sound awful when they go bad.
Nope, I'm familiar with the cam phaser sound. I've got two buddies that had to have a new engine put in their F150's cause of cam phasers, one was an '04, one was an '06 that's in the dealership right now. It was most definitely a diesel.