Interesting comment from an online board
"Any Ford Truck with a 5.4L Engine The 5.4L 3-valve engines used in Ford Trucks from 2004 to 2010 develop camshaft phaser issues, especially when engines exceed the 100,000 mile mark. The first sig...
Forum Discussion
My folks have a 5.4 in their Navigator and it's given them quite a bit of trouble over the years. I realize they aren't all bad motors but I wouldn't buy any vehicle with one in it.
