The contact owns a 2013 Ford F-150. The contact stated that on several occasions while the vehicle was started and running, there was a rattling sound coming from the engine compartment for approximately 30-seconds. The vehicle was taken to a dealer for maintenance and the technician observed the rattling sound after an oil change and suggested that the cam phasers needed to be replaced. The vehicle was not repaired. The contact stated that the check engine warning light illuminated the following day. The manufacturer was notified of the failure. The failure mileage was 110,000.