How to Replace Spark Plugs in a Honda Prelude

In Honda Prelude engines made after 1990, a shorter type of spark plug is used. Use an identical type of spark plugs to replace the dirty and worn spark plugs in the engine. Honda suggests that all spark plugs in Prelude engines be replaced every 60,000 miles.

Instructions

1

Disconnect the negative battery cable to ensure that the Honda Prelude radiator fan does not turn on while you replace the spark plugs. Allow the engine to cool completely. Depending on the climate and the length of the last drive, this may take a couple of hours.

2

Remove the spark plug wires that are located on the side of the engine. The number of spark plug wires the vehicle has corresponds with the number of cylinders the engine has.

3

Place the socket over the spark plug and unscrew the spark plug from the cylinder well. Completely remove the old spark plug from the well.

4

Lubricate the thread around the new spark plug and the connector at the top of the new spark plug. Anti-seize lubricant ensures easy removal the next time the spark plugs are accessed.

5

Thread the new spark plug into the cylinder well manually. If access to the spark plug in the cylinder well is difficult, use the extension to turn the spark plug.

6

Test the spark plug for tension. Adjust the spark plug as needed for the appropriate tension as listed on the spark plug's packaging.

7

Reconnect the spark plug wire and then repeat Steps 2 through 6 with the rest of the spark plugs.

8

Reconnect the battery cable and tighten it into place.