1. Gather your tools and materials. You will need:
* A new set of spark plugs
* A spark plug wrench
* A ratchet
* An extension
* A socket set
* A gap gauge
* Dielectric grease
2. Prepare your car. Turn off the engine and allow it to cool down. Disconnect the negative battery cable.
3. Remove the spark plug wires. Use the spark plug wrench to loosen the spark plug wires from the spark plugs. Be careful not to pull on the wires, as this could damage them.
4. Remove the old spark plugs. Use the ratchet and extension to remove the old spark plugs from the engine. Be careful not to drop the spark plugs into the engine.
5. Check the gap on the new spark plugs. Use the gap gauge to check the gap on the new spark plugs. The gap should be set to the specification in your car's owner's manual.
6. Apply dielectric grease to the new spark plugs. This will help to prevent the spark plugs from seizing in the engine.
7. Install the new spark plugs. Screw the new spark plugs into the engine by hand until they are snug. Then, use the ratchet and extension to tighten the spark plugs until they are tight.
8. Reconnect the spark plug wires. Attach the spark plug wires to the spark plugs by hand until they are snug. Then, use the spark plug wrench to tighten the spark plug wires until they are tight.
9. Reconnect the negative battery cable.
10. Start the engine and test drive your car.
Here are some additional tips for changing spark plugs:
* Be careful not to over-tighten the spark plugs. This could damage the threads in the engine.
* If you are having difficulty removing the old spark plugs, you may need to use a penetrating oil.
* Be careful not to drop the spark plugs into the engine. If you do, you will need to remove the valve cover to retrieve them.
