There has been much discussion about whether a 2011 or later Ford 6.7 diesel has an engine block heater installed at the factory. I can tell you that in my case it was not so, I decided to install a block heater on my 2011 F250, diesel. I decided I wanted the Ford factory products and found them on the internet from a dealer in Missouri. I paid about $135 for a Ford heater element and electrical cord, including shipping. I thought I would share some information and pictures about my experience in installing a block heater.
Overall, the job is fairly easy. Installing the heater element is simple but the cord takes more work if you try to duplicate the factory installation. I recommend removing the right front wheel and the wheel well liner. This makes the job so much easier. Also, just to be safe, cover the battery connection to the starter solenoid with something non-conductive. Do this after removing the wheel well liner; easy. I used duct tape; the handymanís secret weapon. Below is a picture of the heater element installed after removing the factory hole plug. The installed heater is in the center of the picture. This will give you an idea of where it is located while looking through the wheel well. Generally, it is located above the starter solenoid, just in front of the transmission on the engine block (of course).
You have to remove the factory hole plug before installing the heater. It is the plug that has a 9/16 hex socket. You will need a 9/16 hex bit that can be driven with a wrench. It might be possible to use an Allen wrench but the plug is installed fairly tight. I had to use a long handle wrench. The plug is threaded and just backs out. I crawled under the truck to loosen the plug and this made the job a little easier. The plug and the hex bit are shown below.
The heater element from Ford needs a 1-1/4 inch socket to install it. Have your heater element ready to install as you remove the plug and you will lose very little coolant. I lost only 4 ounces making the swap. You may be able to avoid buying more coolant but I bought more just in case. Cost: $23 a gallon; outrageous but it helps maintain warranty status of the truck. I suggest you put thread anti-seize on the threads of the heater element before putting in. Just a suggestion.
As I said before, I chose the Ford element and harness. Here is a picture of the harness, if you want to know what it looks like. I like the fact that Ford insulated the harness and added fasteners that plug into factory holes in the frame for a secure installation.
I completed the installation in 2 hours but I spent most of the time installing the electrical harness. Your installation does not have to take this long. Below is a picture of the cord plugged in to the heating element.
I have only used the block heater a couple of mornings as of this writing but so far it is doing its job. Good luck.