Replace 100,000 Miles Spark Plugs | NGK Iridium | Hyundai Elantra

Introduction

This tutorial will guide you through the process of replacing the spark plugs in a 2016 Hyundai Elantra. Spark plugs are essential for the engine's performance, and replacing them every 100,000 miles is recommended. In this case, the vehicle has 135,000 miles, and it's time for a spark plug change. We will use NGK Iridium spark plugs known for their durability and efficiency.

Step 1: Gather Your Tools and Materials

Before starting the replacement, ensure you have the following tools and materials ready:

• NGK SILZKR7B11 Iridium Spark Plugs (pack of 6)
• 1/4” and 3/8” socket set
• Spark plug gap tool
• 3/8" torque wrench (5-80 ft-lb)
• 3/8" electric ratchet
• Safety glasses and gloves

Practical Tips

• Check that your new spark plugs are the correct type and gap specification for your vehicle.
• Lay out your tools for easy access during the replacement.

Step 2: Prepare the Vehicle

1. Turn off the engine: Ensure the car is parked on a level surface and the engine is cool.
2. Disconnect the battery: Remove the negative terminal to prevent any electrical issues.

Step 3: Access the Spark Plugs

1. Remove the engine cover: If your Elantra has a plastic engine cover, remove it by unscrewing any bolts or clips holding it in place.
2. Locate the spark plugs: The spark plugs are typically found on the top of the engine, beneath the ignition coils.

Step 4: Remove the Ignition Coils

1. Disconnect the ignition coil connectors: Carefully pull off the electrical connectors from each ignition coil.
2. Unbolt the ignition coils: Use the socket set to remove the bolts securing the ignition coils.
3. Lift out the ignition coils: Gently pull them out to expose the spark plugs.

Step 5: Remove the Old Spark Plugs

1. Use a socket wrench: Attach the appropriate socket to the wrench and carefully unscrew each spark plug. Turn counterclockwise to loosen.
2. Inspect the old spark plugs: Check for any signs of wear or damage which may indicate engine issues.

Step 6: Install New Spark Plugs

1. Check the gap: Use the spark plug gap tool to ensure the new plugs are properly gapped according to manufacturer specifications.
2. Insert the new spark plugs: Carefully screw in each new spark plug by hand to avoid cross-threading, then use the socket wrench to tighten them. Follow the recommended torque specifications.
3. Reconnect the ignition coils: Place the ignition coils back in position and secure them with bolts. Reattach the electrical connectors.

Step 7: Reassemble the Engine

1. Replace the engine cover: If removed, put the engine cover back and secure it.
2. Reconnect the battery: Reattach the negative terminal of the battery.

Step 8: Test the Vehicle

1. Start the engine: Turn the ignition to ensure the engine starts smoothly.
2. Check for any unusual sounds or warning lights: Make sure everything is functioning correctly.

Conclusion

Replacing the spark plugs in your Hyundai Elantra is a straightforward task that can significantly enhance engine performance and fuel efficiency. Regular maintenance, including spark plug changes, is crucial for keeping your vehicle in optimal condition. After completing this task, consider scheduling your next maintenance check, and monitor your vehicle's performance for any signs of issues.