Brian75

My Dad has a 2011 ford f 150 3.5 twin turbo eco boost that's making a rattle noise near the front of engine. It startes all of the sudden as he was stopped at a red-light. Drives fine and oil pressure is good . We took to ford place to have a diagnostics ran on it and they had trouble finding where is was coming from . They finally said they see the crank shaft moving in and out and he needs to replace the engine . Has anyone heard of that are think it might be something else ? We were thinking maybe the cam phaser was bad , but ford says other wise . No codes have come up on the truck . Thanks Brian