I am new to this forum so I apologize if this has already been discussed.
I have a 2018 F150 xlt crew that has the 2.7 litre ecoboost that has a cold start noise that sounds like something hitting a metal fan that lasts for about 5-10 seconds after I start.... it only does it when it is cold outside 32 f or 0 c %... if it is warmer it does not do it and it only does it on the first start. I have changed the oil always on time and have always used Ford recommended oil. I have had my truck to two Ford dealers but because there is no "check engine light" on they can't find the problem. I have been under the truck and have looked all around under the hood and I can't find anything that might be vibrating. I am pretty sure that it is not a timing chain slap or lack of oil pressure ,the closest I can tell is that it sounds like it is coming from or near the passenger side turbo. Has anyone else had this problem or know of someone who has ? any information would be greatly appreciated.
I will try to attach some videos to help you guys along.
I thank you for any help.

 

We have a 2018 3.5 ecoboost and we looked into it. It’s just the timing chain rattling. As far as I know there isn’t anything you can do about it. It hasn’t caused any problems, just gets a little annoying lol

 

Be aware,
Delayed oil changes and the non use of the recommend oil can contribute to earlier timing chain wear and problems.

 

Thanks for your reply. As I said in my original post I didn't think it was the timimg chain. I found a video posted on youtube that discribed and sounded just like my truck except his was a 2019 3.5 with only 4000 miles on it. After having been to 3 different dealers who could not solve the problem I took my truck back along with the video that the other fellow had made which he said turned out to be the seperator plate on his truck and whalla I get a call the next day saying "they" {lol} found the problem..... it is the seperator plate. Apparently some bolts came loose on the torque coverter and they strike the seperator plate that contracts due to cold weather.
Thank God for youtube.

 

Indeed the reason could be due to exposure to cold, you should always check the engine before starting the car, especially in cold weather. I decided to do an engine upgrade and found Supercharger for 5.7 Hemi, this is what you need for stable engine operation