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Update.....Ford Reps. came to the dealer and no one could figure out the problem. They installed the updated heads and the noise grew louder. Ford bought back the car, and I'm now in a brand new one, exactly like the old one------minus the engine noise! :D

I have an '02 black Lightning, and got turned on to Coats Cherry Wet Wax on the website. It's AWESOME! Check out www.coatsproducts.com.

I would let them know now, and get the new motor later if it comes back. There is a problem with the camshaft bearing tolerances in the heads and Ford is building the new heads now with the redesign.

Evidently. It sounded deeper than that to me, but I'll find out for sure this afternoon when I pick it up.

Got an update from the dealer today. Ford has redesigned the heads, changing the position of the cam bearings. The new heads for my car have been ordered and will be in sometime the next couple of weeks. I get the car back today, as Ford said it will not cause a problem to drive it until the...

Heard it mainly at idle, after the engine had warmed up. It progressively grew louder over a couple hundred miles.

Took the Mach to the dealer Thursday for knocking sound in the left (drivers)side of the engine. It's an '04 with a little over 1300 miles on it and the noise started a couple of hundred miles ago. The service dept. mgr. said there was a technical service bulletin for '03 Machs concerning this...