Owners of other Ford and Lincoln vehicles such as the Escape, Expedition, EcoSport, Flex, Explorer, Fiesta, Focus, Fusion, Mustang, Taurus, Ranger, Transit Connect, F-150, Endura, C-Max, Kuga, Mondeo, MKZ, Navigator, Aviator, Nautilus and Continental may also find these DIY instructions to be helpful.

The original OEM Ford spark plugs are part number Motorcraft SP-537.

A few compatible replacement spark plugs with their part numbers include the following: NGK (6509) LTR6IX-11 Iridium, ACDelco 17, Champion 9016 and NGK ILTR6G8G Laser Iridium.

The tools and other items needed to complete this procedure include an 8mm socket with a 1/4" drive ratchet, a 5/8" spark plug socket, a 6" extension bar, a 3/8" drive ratchet and a tube of dielectric grease.

The first two steps are to open the hood and gently pull off the plastic cover.

The cover is held in place by four rubber friction fasteners attached to metal pegs on the top of the engine.

Set the engine cover aside in a safe place.

To access the spark plug on the right (driver) side of the engine, you will need to detach the vacuum line from the air intake assembly.

Loosen the single bolt on the ignition coil housing by rotating it in the counterclockwise direction with an 8mm socket and a 1/4" drive ratchet.

Set the bolt aside in a safe place.

Push in the release tab on the electrical connector before sliding it straight off the ignition coil.

Pull the ignition coil straight out of the spark plug well and set it aside in a safe place.

If your Edge is displaying a SES or CEL (service engine soon or check engine light) on the gauge cluster, you can use an OBD II scan tool (also known as an OBD2 scanner) to see if the problem is an ignition coil related DTC (diagnostic trouble code) such as P0351, P0352, P0353 or P0354.

The original OEM ignition coil is Ford part number FoMoCo CM5E-12A366-BC.

I recommend only checking or changing one spark plug at a time to help reduce the risk of having a foreign object fall down into the cylinder.

Lower the socket down over the top of the old spark plug.

Carefully loosen the old spark plug by turning it in the counterclockwise direction.

If you have trouble loosening a stuck, stubborn, rusted or corroded old spark plug, spray a small amount of penetrating oil such as PB Blaster, Kano Kroil or Liquid Wrench down into the spark plug well.

Allow the penetrating oil to seep into the threads for at least five to ten minutes before trying to loosen the old plug again.

Spin out the old spark plug the rest of the way by hand.

Lift the old plug out of the well and detach it from the socket.

Inspect the old spark plug.

If the electrode tip is dark grey or black and coated with oil, carbon or soot, the engine may be burning oil and should be checked by a professional mechanic.

If the electrode is white or ashy looking, the engine may have been subjected to over heating. It would be wise to check your coolant system.

The original OEM spark plugs in this 2017 Edge were the Motorcraft SP-537.

If you have a spark plug gap gauge, check the gap on the new spark plugs. The owner's manual and service manual specification for the spark plug gap range is from 0.027" to 0.031" of an inch.

Some of the NGK brand plugs come pre-gapped to 0.032" and will need to be adjusted to about 0.031".

Push the new spark plug into the socket.

Carefully lower the new spark plug down into the well.

Spin in the new spark plug a few turns by hand in the clockwise direction to prevent it from becoming cross threaded.

Tighten the new spark plug to just a fraction of a turn past the point when you feel the new crush washer collapse or when it feels nice and snug.

I've never used a torque wrench to tighten spark plugs since you can easily over tighten them.

Do not over tighten the spark plugs!

If you do insist on using a torque wrench, the spark plug torque value specification in the service manual is 133 lb-in (pounds per inch) or 11 lb-ft (pounds per foot) or 15 N-m (Newtons per meter).

If you are re-installing the old spark plugs, just tighten them to a small fraction of a turn past finger tight until it is snug.

Some people prefer to use anti-seize on the new spark plug threads, although most spark plug manufacturers do not recommend using anti-seize since it can easily lead to over tightening.

Apply a small amount of dielectric grease to the opening in the rubber dust boot at the bottom of the ignition coil housing.

The dielectric grease will help keep out any moisture or debris and ensure a reliable electrical connection.

Rotate the ignition coil back and forth a few times to spread the dielectric grease.

Line up the bolt hole in the ignition coil housing with its corresponding hole in the top of the engine.

Spin in the single silver metal bolt a few turns in the clockwise direction to prevent it from becoming cross threaded.

Try to avoid over tightening the bolt to prevent from cracking the plastic ignition coil assembly.

Push the electrical connector straight into its socket on the ignition coil.

Gently slide the white plastic locking tab in towards the ignition coil.

Line up the four rubber friction fasteners on the underside of the plastic engine cover with their corresponding pegs or "spikes" on the top of the engine.

Push the engine cover down into place to secure it.

Start the engine and listen closely for any strange noises that may indicate a problem such as a loose spark plug or a disconnected power plug.

Be sure to write down the spark plug change in your SUV's service records. The owner's manual service interval specification for replacing the spark plugs is 100,000 miles (or "100K").

Please check out all of my 2015-2019 Ford Edge DIY Repair & Maintenance Guides.