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I just took my 2006 Expedition with 5.4L into the dealer for a ticking noise.
They told me that is was the cam sensor and cam phaser. Repairs should be around $1400.00. Does that seem right to you all.
How many miles are on your Expy? Is it out of warranty? Any chance the ticking you are hearing is the typical noise associated with the valvetrain in the modular engines? Last question - what brand oil filter are you using?
On the ticking aspect...it really depends. Some guys go forever with the noise with zero issues. I have seen a few though that self-detonated
I personally would save my money and wait for a bigger problem. IMO, there is no point in throwing $1,400 at the top end, while the rest of the motor has some miles on it...money would be better spent IMO if/when the motor blows later on down the road if you just buy a whole new longboock
BTW, what oil and filter you using?
I highly recommend Motorcraft oil filter FL-820S, and Motorcraft Semi-Synthetic 5w20 ONLY and nothing else.
Fram filters and National Chain filters don't have good Anti-Drainback chech valves. This can lead to the noises you are hearing