Discover the Secret of How to Change Spark Plugs 2019 Subaru Outback Like a Pro!

Are you the kind of car owner who likes to get their hands dirty and tackle maintenance tasks themselves? If so, then changing the spark plugs on your 2019 Subaru Outback might be a project you’re interested in taking on. While it might seem intimidating at first, this task is actually quite doable for even novice DIYers. This comprehensive guide will walk you through the process step-by-step, equipping you with the knowledge and confidence to successfully change your spark plugs.

Why Change Spark Plugs?

Spark plugs are essential components in your car’s engine, responsible for igniting the air-fuel mixture and powering your vehicle. Over time, spark plugs wear down and can cause various issues, impacting your car’s performance and fuel efficiency. Here are some signs that your spark plugs might need replacing:

• Engine Misfires: If you experience a rough idle, stuttering, or jerking while driving, it could indicate a faulty spark plug.
• Reduced Fuel Efficiency: Worn spark plugs can lead to inefficient combustion, resulting in lower gas mileage.
• Difficult Starting: If your car struggles to start, especially in cold weather, it might be due to worn spark plugs.
• Check Engine Light: A lit check engine light can often be caused by a faulty spark plug.

Gathering the Necessary Tools and Materials

Before you begin, gather the following tools and materials:

• New Spark Plugs: Ensure you purchase the correct spark plugs for your 2019 Subaru Outback. Consult your owner’s manual or a reputable online parts store for the specific model and specifications.
• Socket Wrench Set: You’ll need a socket wrench that fits the size of your spark plugs (typically 5/8 inch).
• Torque Wrench: A torque wrench is essential for tightening the spark plugs to the correct specifications.
• Ratchet: A ratchet will make it easier to loosen and tighten the spark plugs.
• Extension: An extension will help you reach the spark plugs located in the back of the engine.
• Spark Plug Gasket: While some spark plugs come with pre-installed gaskets, others require separate ones.
• Gloves: Protect your hands from grease and dirt.
• Safety Glasses: Always wear safety glasses to protect your eyes.
• Cleaning Rags: You’ll need cleaning rags to wipe down the spark plug wells.
• Penetrating Fluid (Optional): If the spark plugs are difficult to remove, penetrating fluid can help loosen them.

Step-by-Step Guide to Changing Spark Plugs

Now, let’s dive into the step-by-step process of changing your 2019 Subaru Outback‘s spark plugs:

1. Preparation:

• Park the car on a level surface and engage the parking brake.
• Disconnect the negative terminal of the battery. This is a crucial safety step to prevent electrical shocks.
• Locate the spark plugs. In the 2019 Subaru Outback, they are usually located on the top of the engine, under a plastic cover.

2. Removing the Spark Plug Cover:

• Remove the plastic cover. You might need to use a screwdriver or a socket wrench to loosen any clips or screws holding the cover in place.

3. Loosen and Remove the Spark Plugs:

• Use the socket wrench and ratchet to loosen the spark plugs. Rotate the socket wrench counter-clockwise.
• Once the spark plugs are loose, remove them by hand. Be careful not to drop them, as they can easily get damaged.

4. Clean the Spark Plug Wells:

• Use a cleaning rag to wipe down the spark plug wells. This will remove any dirt or debris that could contaminate the new spark plugs.

5. Install the New Spark Plugs:

• Apply a small amount of anti-seize compound to the threads of the new spark plugs. This will help prevent them from seizing in the engine.
• Thread the new spark plugs into the spark plug wells by hand. Make sure they are seated properly.
• Use the torque wrench to tighten the spark plugs to the specified torque. You’ll find the correct torque specification in your owner’s manual or online.

6. Reassemble and Test:

• Replace the spark plug cover.
• Reconnect the negative battery terminal.
• Start the engine and let it run for a few minutes. Listen for any unusual noises or misfires.

Tips for Successful Spark Plug Replacement

• Use a spark plug socket with a rubber insert. This will prevent the socket from slipping and damaging the spark plugs.
• Don’t overtighten the spark plugs. Overtightening can damage the spark plug threads and the engine head.
• Inspect the spark plugs for signs of wear. If the spark plugs are worn or damaged, replace them with new ones.
• If you’re not comfortable changing spark plugs yourself, take your car to a mechanic.

Final Thoughts: Embracing DIY Maintenance

Changing spark plugs on your 2019 Subaru Outback can be a rewarding experience, allowing you to save money and gain a deeper understanding of your vehicle. By following the steps outlined in this guide, you can confidently tackle this maintenance task yourself. Remember to always prioritize safety, use the correct tools and materials, and refer to your owner’s manual for specific instructions.

What You Need to Know

1. How often should I change my spark plugs?

The recommended interval for changing spark plugs varies depending on the type of spark plugs and your driving habits. However, a general guideline is to replace them every 30,000 to 100,000 miles. Check your owner’s manual for specific recommendations.

2. Can I use different spark plugs than the ones recommended by Subaru?

It’s generally best to stick with the spark plugs recommended by Subaru. Using different spark plugs could potentially affect engine performance and fuel efficiency.

3. What happens if I don’t change my spark plugs on time?

Ignoring worn spark plugs can lead to various issues, including engine misfires, reduced fuel efficiency, difficult starting, and even engine damage.

4. Can I change my spark plugs myself if I don’t have a torque wrench?

While it’s possible to tighten the spark plugs without a torque wrench, it’s highly recommended to use one. A torque wrench ensures that the spark plugs are tightened to the correct specifications, preventing them from being overtightened or undertightened.

5. Can I use a regular socket instead of a spark plug socket?

It’s not advisable to use a regular socket. Spark plug sockets are designed with a rubber insert to prevent the socket from slipping and damaging the spark plug.