Just curious if you ever got this one figured out. I think I have the same thing going on. Truck runs great, just have a ticking or hammering sound during idle. I can't tell when I am driving, too loud. It almost sounds like tapping on a thin piece of metal like engine or tranny pan kind of noise. To me it is worse right at first start up and seems to go away as engine warms up. Just curious if you figured this one out.
Hello Dodean, I am going to accept Marc's analysis on it.... I hear the same noise in about half of our 7.3's that come in here, mine is just the loudest, with only one other one rivaling my noise level... I will accept the answer from Marc above that it is OK... Amplifier Piston doing it thing... I assume that is the high pressure injection pump, right Marc?
All hail Marc, great Ford Guru, and tireless helper to us all on this Forum... Marc you are to be thanked "For Service Above and Beyond the Call of Duty"... Cheers..
Anyways, I accept that it is normal, the only other one that was AS loud as mine only had 7000 miles on it.. Hardly worn out... Ha!
It might be a result of altered exhaust or something that makes the inherent noise seem louder. Anyway, I ran mine hard for 5000 kms, no change, any serious engine noise or hydraulic lifter leak would have burned a valve or blown something by now, and zero, zip, nada.... I still notice it come and go, but no longer worry about it.. So there is my best judgement Dodean..
Regards from Australia... Lone Ranger