joleo5757- "Does the Ticking noise go away when warmed up? If so look at the Exhaust manifold bolts, they rust out and break, causing a leak that goes away after warming up. You can look through the inner fender well to inspect. If not,I know Ford had Wrist pin Noise on a cold engine when starting out."
if this is the case the bolts can be a real pita because they will have to be removed and replaced. i took my expedition to a local exhaust repair shop and they used a "hush studfix". they fixed it within a matter of minutes and it turned out to be a very easy job that i could have done myself. apparently the part is for sale online.
definitely check it out.