How do you change spark plugs on a Ford Explorer 1991 through 2008 all models?

Answer 1

Spark plugs are located on each side of the engine, right under the heads, screwed into the block. The easiest way to change them is through the wheel well. Remove each front wheel/tire and then just take off the rubber dust shields at the bottom of the wheel well (held on by push-pins). For even better access you can remove the fender well. This will make access to the plugs very easy. If the boots will not come loose you can cut them vertically with a knife. This requires replacing the plug wires. Use a spray of lithium grease inside the boot to make removal easier the next time. Plugs are on top of the engine. Each plug has its own coil on top it that is part of the plug boot. A bolt holds each coil and boot in place. Remove bolt and coil, then plugs are exposed. There is a detailed article with video here ; www.carbasics.co.uk/how_to_change_spark_plugs.htm