Hello, I recently purchased a 2011 F150 Platinum with 120,000 miles. Since it has been getting colder outside, when I startup my truck I hear a squeak/grinding noise for about half of a second. It sounds almost like something is rubbing together for a brief second. The truck drives great and has no power cutoff or misfire like many people run into with this engine. I would just like to know if anyone else has had this same sound from their engine when they start it up and if it is a serious issue or not. You will find two videos attached. The first is the truck starting up making the noise I am concerned about and the second is the engine running to show that it sounds great other than the initial noise.