How to Replace Spark Plugs in a Ford Mustang

The Ford Mustang was first released in 1964. Since then, the shape, style and engine have been improved. One thing that has not changed on the Mustang is how to replace the spark plugs. Each Mustang model's spark plugs need to be replaced every 30,000 to 60,000 miles, unless they are platinum spark plugs, which last 100,000 to 130,000 miles.

Instructions

1

Pop the hood and allow the engine to cool down until the machine is cool to the touch. For models made before 1995, disconnect the battery cable.

2

Find the spark plug wires that are connected to the engine by the ignition coil. There are equal amounts of spark plugs on either side of the engine. Grab one of the wires by its boot, which is the larger piece at the end of the wire.

3

Turn the boot to the right and then to the left to loosen it. Pull back on the wire to remove it from the spark plug.

4

Slide the socket over the old spark plug and turn it to the left to unscrew it. Pull the spark plug from the Mustang engine's cylinder well.

5

Apply silicon dielectric compound to the wire boot and across the threads of the new spark plug. If it's a platinum spark plug, do not use the compound on the threads.

6

Screw the spark plug into place manually and test the tension on the plug. The package the spark plug came in indicates the appropriate tension. If the required tension is not met, it may cause damage to the Mustang engine.

7

Place the wire back onto the spark plug and twist the wire in both directions until you hear it click into place.

8

Repeat Steps 2 through 7 for the remaining spark plug wires. Connect the battery cable when finished replacing all of the spark plugs.