How do you change the spark plugs on a expedition?

Answer 1

You will need to know what engine you have. 4.2 L V6, 4.6L and 5.4L V8. Buy spark plugs before you want to do the work so that engine has cooling time. Each engine size uses a different spark plug size. You will need a spark plug socket (start with 13mm), torque wrench, ratchet, extension, and spark plug gap gauge. Remove one spark plug wire from plug, pull only on the boot and one at a time. The spark plug should be gapped the same as the one specified on the Emissions Control Information label. 2000 and newer come with individual coil packs that need to be removed to get to the spark plugs. Use compressed air to move dirt and debris away from the plug hole. Place the socket over the plug, turn it in a counterclockwise direction to remove. Apply a small amount of anti seize compound to the threads,on the new one, place back into hole and place a new wire on the plug. Repeat until finished. Replace every 60,000 miles/48 months.

To remove the coil pack, disconnect the electrical connector and remove the coil pack retaining screw and pull straight up and out to remove the coil pack.