The ticking may have been related to the low dirty oil condition, did you get proof of regular service? the engine in your truck does have some history of oil consumption problems, but I think by 05 they where fixed by Ford, the ticking is either the cam chain or the cam followers, never heard anything called a camshaft phaser, and I have worked for a Ford dealer 20 years. Abnormal oi use is anything over 1 quart US for every 1000 miles of driving, a little more if you drive in hot weather conditions. Put a can of Berrymans Chemtool in the oil, this may help to clean the inside of the engine, also make sure to run either 10-30W or lighter in the engine, heavier oils will cause bearing damage.
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1999 Navi makes same ticking sound, isolated it at passenger side rear cylinders. Sounds like a solid lifter noise. Is this something common or do you let it go? Should this be addressed? Previous owner told me about it prior and said it had been making sound for some time. I thought initially that it was an exhaust leak before I drove it.
i also have a 2005 navigator with the 5.4L engine a have a idle knock that goes away with the slightest touch of the throdle its pretty bad i have been aked if its a diesl before.hope someone can shed some light on this for me
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