Tools and Materials Needed:
- Spark plug socket wrench
- Spark plug gap gauge
- New spark plugs (ACDelco 41-993 or equivalent)
- Dielectric grease
Instructions:
1. Allow the engine to cool down completely before starting the task.
2. Open the hood and locate the spark plugs on the engine. They are located on top of the engine, one for each cylinder.
3. Disconnect the ignition coils by unplugging the electrical connectors.
4. Use a spark plug socket wrench to loosen and remove the old spark plugs.
5. Check the gap of the new spark plugs using a gap gauge. The gap should be set to 0.045 inches. Adjust the gap if necessary by bending the electrode on the spark plug.
6. Apply a small amount of dielectric grease to the threads of the new spark plugs. This will help prevent the spark plugs from seizing in the cylinder head.
7. Screw the new spark plugs into the cylinder head by hand until they are finger-tight.
8. Use the spark plug socket wrench to tighten the spark plugs to 18 foot-pounds (24 Newton-meters). Do not overtighten the spark plugs, as this can damage the cylinder head.
9. Reconnect the ignition coils to the spark plugs.
10. Start the engine and let it run for a few minutes to warm up. Check for any leaks around the spark plugs.
Tips:
- If you have difficulty removing the old spark plugs, spray the threads with penetrating oil and let them sit for a few minutes.
- Be careful not to drop the spark plugs.
- Replace all six spark plugs at the same time to ensure even firing and performance.
