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Yes, it is probably from the foam filled bags within the driver side front and passenger side front fenders.  I removed these bags entirely and the foam never re-appeared within the squirrel cage.

My droning loud blower noise was some loose foam in blower cage. 2020 TC

Is the engine running different than it has in the past? Is there any sign of contamination in the oil? If the answer is no then a code scan is in order. Then a static pressure test of the cooling system would be next.  How many miles are on the TC?   The Head  gasket replacement will be a sizeable job Involving  the front engine cover and cam shaft timing chains , Intake and exhaust manifold removal.  It could include a valve job for the head .  All the hoses and water pump need to be checked  and the radiator end caps need to be looked at. If nothing obvious is found 1/2 a bottle of this won't hurt and could save the Day.  I have used this as a permanent fix more than once! Good luck and update us when you can.  

For some owners, this key chart will apply.  I believe that this chart is about a decade old.  Newer cars made in the last 10 years will have a different type of key.              

Transponder keys have an RFID chip inside of the key.  That is recognized by a reader near the ignition.  It can be cloned.  You can buy a key blank, copy your key for the physical lock tumblers, and then electronically clone the RFID of your key.  The car will see both keys as the same key.   There are different things that can be done with the electronic key identification by the car's passive anti theft system.  With a Ford IDS computer, or a Snap On computer, it is possible to delete individual keys, delete all keys, program new keys, etc.  Most dealerships, automotive locksmiths, and some independent mechanics, will know how to do this.       In The USA, you have the right to repair.  Key blanks and key fobs are easily found online, and in retail stores.  Any hardware store or shoe repair shop can manually duplicate the cuts on a key.  You can certainly buy a Ford IDS computer or a Snap On computer.  Key clone tools are readily available from locksmith suppliers, and even on Amazon and eBay.                                                      

The door locking/latch/switch is one integrated part.  Door ajar…chattering locking and about 3 other things are caused by this assembly  charles 

will i need these to install the seat in in 2017 cargo van??

Yeah, you need the transponder in order to start the vehicle. There are smaller non-button chip-keys you could get but you need a locksmith or the dealership to cut and program it. Running around with 1 working key isn't a great idea either. If you lose your only key, most Fords need 2 keys cut and programmed at minimum to get going