2014 - 2020 Toyota highlander spark plugs replacement. Save money diy

Introduction

This tutorial provides a step-by-step guide for replacing the spark plugs in a 2014-2020 Toyota Highlander with a V6 engine. Changing your spark plugs can improve engine performance, increase fuel efficiency, and save you money on maintenance. Follow these instructions carefully to complete the task yourself.

Step 1: Gather Your Tools and Materials

Before starting, collect all necessary tools and materials to ensure a smooth replacement process.

You will need:

• New spark plugs (check your owner's manual for specifications)
• Socket wrench set
• Torque wrench
• Extension bars for socket wrench
• Spark plug gap tool (if needed)
• Dielectric grease
• Clean cloth or shop towel
• Safety glasses

Step 2: Prepare the Vehicle

Make sure your vehicle is ready for the spark plug replacement.

• Park the vehicle on a flat surface and turn off the ignition.
• Open the hood and secure it.
• Disconnect the negative battery terminal to prevent any electrical issues.

Step 3: Remove Engine Cover (if applicable)

Depending on your model, you may need to remove the engine cover to access the spark plugs.

• Locate the bolts securing the engine cover.
• Use a socket wrench to remove the bolts.
• Carefully lift off the cover and set it aside.

Step 4: Access the Spark Plugs

Now that the cover is removed, you can access the spark plugs.

• Identify the location of the spark plugs on the engine.
• If there are ignition coils over the spark plugs, you will need to remove them first.

To remove ignition coils:

1. Disconnect the electrical connectors from each coil.
2. Remove the bolts securing the coils using a socket wrench.
3. Gently pull the coils out of their sockets.

Step 5: Remove Old Spark Plugs

With the ignition coils out of the way, you can now remove the old spark plugs.

• Use a spark plug socket attached to an extension bar to reach the plugs.
• Turn counterclockwise to loosen and remove each spark plug.
• Inspect the old spark plugs for wear or damage.

Step 6: Install New Spark Plugs

Now it’s time to install the new spark plugs.

• Check the gap of the new spark plugs using a spark plug gap tool. Adjust if necessary.
• Apply a small amount of dielectric grease to the threads of the new spark plugs.
• Carefully thread each spark plug into its socket by hand to avoid cross-threading.
• Use a torque wrench to tighten each spark plug to the manufacturer’s specifications (typically around 13-16 lb-ft).

Step 7: Reinstall Ignition Coils

Put the ignition coils back in place after the new spark plugs are installed.

• Align each coil with its corresponding spark plug and press down gently.
• Secure the coils with the bolts and reconnect the electrical connectors.

Step 8: Reattach Engine Cover

If you removed an engine cover, it’s time to put it back.

• Position the engine cover back on the engine.
• Tighten the bolts securely with a socket wrench.

Step 9: Reconnect the Battery

Finish up by reconnecting the battery.

• Attach the negative battery terminal and tighten it securely.
• Ensure everything is properly reassembled.

Conclusion

Congratulations! You have successfully replaced the spark plugs in your 2014-2020 Toyota Highlander. Regular maintenance like this can enhance your vehicle's performance and longevity. Consider keeping track of your maintenance schedule and check the spark plugs every 30,000 miles or as specified in your owner's manual. For further assistance or more DIY projects, check out related videos and tutorials.