Some 2015-2016 Lincoln Navigator vehicles equipped with a 3.5L gasoline turbocharged direct injection (GTDI) engine may exhibit a hard-to-start or no-start condition after using the block heater when temperatures are below 0 degrees Fahrenheit.
Remove and discard the existing cooling system heater and wire harness. Install the immersion block heater and harness kit. Refer to instructions in the kit. It is not necessary to remove the left hand turbo assembly. Use special tool 303-1638 to install the immersion block heater. Refill the cooling system.
The immersion block heater kit is available as P/N FL3Z-6D008-A. Use Motorcraft Orange concentrated antifreeze/coolant VC-3-B.