How to Change Spark Plugs on 2018 Chevy Malibu? A Step-by-Step Guide

As a car owner, it’s essential to stay on top of your vehicle’s maintenance to ensure it runs smoothly and efficiently. One critical component that often gets overlooked is the spark plugs. Spark plugs play a vital role in igniting the fuel in your engine, and when they wear out, it can lead to decreased performance, poor fuel economy, and even engine damage. In this comprehensive guide, we’ll walk you through the process of changing spark plugs on a 2018 Chevy Malibu. Whether you’re a DIY enthusiast or a seasoned mechanic, this article will provide you with the necessary steps, tools, and tips to get the job done efficiently>

Why Spark Plugs Need to be Replaced

Spark plugs are designed to last for a certain number of miles, typically between 30,000 to 100,000 miles, depending on the type of spark plug and driving conditions. Over time, spark plugs can become worn out, fouled, or damaged, leading to a range of problems, including:

• Poor Engine Performance: Worn-out spark plugs can cause your engine to misfire, leading to poor acceleration, rough idling, and decreased power.
• Decreased Fuel Economy: Faulty spark plugs can cause your engine to burn more fuel than necessary, leading to decreased fuel economy and increased emissions.
• Engine Damage: Ignoring spark plug maintenance can lead to engine damage, including cylinder head damage, engine failure, and costly repairs.

By replacing your spark plugs regularly, you can avoid these problems and ensure your engine runs efficiently and effectively.

Tools and Materials Needed

Before you start, make sure you have the following tools and materials:

• Spark plug socket: A spark plug socket is a specialized tool designed to remove and install spark plugs. You can purchase a spark plug socket at an auto parts store or online.
• Ratchet and extension: A ratchet and extension will give you the necessary leverage to remove the spark plug.
• Torque wrench: A torque wrench is essential for tightening the spark plug to the recommended torque specification.
• New spark plugs: Make sure you purchase the correct type and number of spark plugs for your 2018 Chevy Malibu.
• Spark plug gap gauge: A spark plug gap gauge is used to set the correct gap between the spark plug electrodes.

Locating the Spark Plugs

On a 2018 Chevy Malibu, the spark plugs are located on the side of the engine. You’ll need to remove the engine cover to access the spark plugs. Here’s how:

Remove the engine cover by unscrewing the screws that hold it in place. You may need to use a screwdriver or wrench to remove the screws.

Once you’ve removed the engine cover, you’ll see the spark plug wires connected to the spark plugs. Identify the spark plug you want to replace and follow the spark plug wire to the spark plug:

Removing the Spark Plug

Now that you’ve located the spark plug, it’s time to remove it. Here’s how: (See Also: Where Does the Spark Plug Go? In Your Engine)

Attach the spark plug socket to the ratchet and extension. Insert the spark plug socket into the spark plug well and turn it counterclockwise until the spark plug is loose.

Once the spark plug is loose, remove it from the spark plug well. Be careful not to touch the spark plug’s ceramic insulator to prevent damage.

Installing the New Spark Plug

Now that you’ve removed the old spark plug, it’s time to install the new one. Here’s how:

Take the new spark plug and insert it into the spark plug well. Make sure it’s properly seated.

Use the torque wrench to tighten the spark plug to the recommended torque specification, usually around 10-15 ft-lbs.

Repeat the process for the remaining spark plugs, making sure to install them in the correct order.

Tightening the Spark Plug Wire

Once you’ve installed the new spark plug, it’s essential to tighten the spark plug wire to the spark plug. Here’s how:

Take the spark plug wire and attach it to the spark plug. Make sure it’s properly seated. (See Also: Is it Necessary to Torque Spark Plugs? Explained)

Use the spark plug wire puller to tighten the spark plug wire to the recommended torque specification.

Reinstalling the Engine Cover

Now that you’ve replaced the spark plug, it’s time to reinstall the engine cover. Here’s how:

Place the engine cover back in its original position and screw it back in using the screws you removed earlier. Make sure they’re tightened securely.

Summary and Recap

In this comprehensive guide, we’ve walked you through the process of changing spark plugs on a 2018 Chevy Malibu. By following these steps, you can ensure your engine runs smoothly and efficiently. Remember to replace your spark plugs regularly to avoid engine damage and decreased performance.

Here are the key points to remember:

• Spark plugs need to be replaced regularly to avoid engine damage and decreased performance.
• The correct tools and materials are essential for replacing spark plugs.
• Locating the spark plugs on a 2018 Chevy Malibu requires removing the engine cover.
• Removing and installing spark plugs requires a spark plug socket, ratchet, and extension.
• Tightening the spark plug wire is essential for proper spark plug function.

Frequently Asked Questions

How often should I replace my spark plugs?

It’s recommended to replace your spark plugs every 30,000 to 100,000 miles, depending on the type of spark plug and driving conditions.

What type of spark plug should I use for my 2018 Chevy Malibu?

Make sure to purchase the correct type and number of spark plugs for your 2018 Chevy Malibu. You can consult your owner’s manual or speak with a mechanic for guidance. (See Also: Are Champion Spark Plugs Better Than Ngk? The Ultimate Comparison)

Can I replace spark plugs myself or do I need a mechanic?

If you’re comfortable with DIY projects and have the necessary tools and experience, you can replace spark plugs yourself. However, if you’re unsure or lack experience, it’s recommended to consult a mechanic.

What are the symptoms of worn-out spark plugs?

Worn-out spark plugs can cause poor engine performance, decreased fuel economy, and engine damage. Look out for symptoms such as misfires, rough idling, and decreased power.

Can I reuse my old spark plug wires?

No, it’s not recommended to reuse old spark plug wires. Spark plug wires can become damaged or worn out over time, leading to decreased performance and engine damage. It’s best to replace them with new ones.