Reported Jan 10, 19784,869 vehicles affectedFORD MOTOR COMPANYBuilt Aug 1, 1972 – Dec 1, 1977
The defect
The engine cooling fan blades may crack from vibrational motion. Blade fragments may separate without prior warning from a cracked blade while the vehicle IS in operation.
The remedy
The dealer will replace existing fan with a service fan of a new design, at no charge.
Vehicle description: trucks equipped with 361, 389 or 391 ft engines and at-540transmissions.system: engine; engine cooling fan blades.consequences of defect: the blade fragments could damage engine components and,if the hood IS open while the engine IS running, the fragments could fly outand cause injury to persons in the vicinity.note: the engine should not be operated with the hood open until the engine fanhas been replaced.