How to Replace Spark Plugs in a Honda Accord

Honda suggests you change the spark plugs in an Accord every 100,000 miles. Clean, effective spark plugs reduce fuel use and keep the engine running smoothly. Replacing the spark plugs in a Honda Accord takes 30 minutes to 1 hour to complete.

Instructions

1

Cool the Accord engine. Park the car in a shaded area and pop the hood. If you change spark plugs in a warm or hot engine, it causes cylinder head damage.

2

Remove the plastic engine cover if the Accord was made after 2000. Locate the spark plug wires along the sides or across the top of the engine. The wires slide over the spark plug.

3

Grab the wire boot, which is at the end of the wire. Turn the wire 1/2 turn to the right and 1/2 turn to the left to release the lock. Pull back on the wire to remove it. Replace one spark plug at a time. If a wire is placed on the wrong cylinder, it may damage the engine, so your best bet is to work with only one spark plug at a time.

4

Unscrew and remove the old spark plug from the cylinder well. On models made after 2000, the spark plug wires are on top of the engine and an extension is needed to remove and install the spark plugs.

5

Apply a coat of anti-seize lubricant around the threads of the new spark plug and on the wire boot.

6

Slide the new spark plug into the cylinder well and manually tighten it in place.

7

Test the tension and set the spark plug to the correct tension. The required tension varies by spark plug manufacturer, so check the spark plug's packaging for the tension needed for an Accord engine. Reconnect the spark plug wire.

8

Repeat Steps 3 through 7 for the remaining spark plugs. Replace the plastic dust cover after all the spark plug are replaced.