Spark Plug: Service Precautions

CAUTION:


- Allow engine to cool BEFORE removing spark plugs. Attempting to remove spark plugs from a hot engine may cause plug to seize, causing damage to cylinder head threads.

- Clean spark plug recess area BEFORE removing plug. Failure to do so can result in engine damage due to dirt or foreign material entering cylinder head, or in contamination of cylinder head threads. Contaminated threads may prevent proper seating of new plug.

- Use only spark plugs specified for use in the vehicle. DO NOT install spark plugs that are either "hotter" or "colder" than those specified for the vehicle. Installing plugs of another type can severely damage the engine.