One problem related to engine clicking and tapping noises has been reported for the 2011 Ford F-350. The most recently reported issues are listed below.
While traveling north bound on the maine turnpike at mm 34 I experienced a loss of power. I was in the left lane with heavy traffic. I made my way safely to the right hand breakdown lane. I noticed white smoke coming from under the hood. I heard a popping sound. After I stopped, the engine was still running, but smoke was coming from under the hood and starting to enter the cab on the right side. I shut the engine off and but on my emergency flashers. Traffic was very heavy. I exited the cab and looked under the hood. There was no fire, but I could smell diesel fuel. The truck has the 6. 7 liter Ford diesel. I noticed fuel leaking onto the frame on the right side behind the front tire. I called Ford roadside assistance and was towed to the Ford dealer in portsmouth, nh where I bought the truck. When I got home I did some research online and found out the hold down clamp for the fuel injectors had been replaced by a new part number. These crack and can allow the injector to blow out of the cylinder head. They spray fuel in the engine compartment after exiting the head. Ford has issued a TSB 12-3-4 on the matter. Others have experienced this problem. Why has this not been recalled is beyond me. I was surprised I did not have a fire! Ford will only replace the affected part, not all 8. I have opened a case with Ford to have all 8 replaced. At this point in time the part is back ordered. The dealer did locate 1 and will be installing it tomorrow. I assume this is a redesigned part.