Does AutoZone Change Spark Plugs In 2024? A Detailed DIY Guide

Spark plugs are one of the most crucial components in your engine‘s ignition system. Acting like a switch, they produce the high voltage current that creates a spark to ignite the fuel/air mixture in the combustion chamber.

Over time, spark plugs become worn down through heat, residue buildup, and constant sparking. This can lead to reduced engine power, poor fuel economy, difficult starting, and even complete breakdowns.

Replacing spark plugs is maintenance that every car owner needs to tackle periodically. But does AutoZone offer spark plug replacement services in their stores? Let‘s take a deeper look.

Why Spark Plugs Matter So Much in Your Engine

To understand why regular spark plug replacement is vital, you need to know what these little parts do. Here are some key facts about spark plug function from Haynes repair manuals:

• Spark plugs must withstand extremely high temperatures of up to 4,000°F while also handling around 30,000 volts of electricity.

• The spark delivered by the plug is what begins the air/fuel combustion needed for the power stroke. Without consistent sparks, your engine simply won‘t run.

• Electric current flows from the ignition coil through the plug electrodes to create a high voltage discharge of about 20,000-30,000 volts.

• Good sparking relies on properly gapped electrodes. A gap too large or too small will cause misfires.

• Residue buildup on the plugs from fuel additives, oil, and combustion byproducts can interfere with sparks.

Given these demands, it‘s no surprise spark plugs deteriorate over time. AutoZone recommends replacement every 30,000-60,000 miles to maintain engine performance. Let‘s look at whether they provide this service.

AutoZone Does Not Replace Spark Plugs – But They Can Assist Your DIY Efforts

Unfortunately, AutoZone does not offer spark plug replacement or any other automotive repair services. This well-known auto parts retailer focuses strictly on sales of parts, tools, and accessories.

According to AutoZone customer service, reasons they do not provide installations include:

• AutoZone stores are set up as retail outlets not repair shops. Most lack the space and equipment needed for automotive repairs.

• Store staff are trained in parts lookup and sales, not mechanical repairs. Liability concerns would make spark plug installation risky for their non-mechanic employees.

• Time constraints make it impractical for them to tie up staff for lengthy repairs like spark plug changes.

However, just because AutoZone doesn’t do installations themselves doesn’t mean they won’t support you in a DIY replacement. Let‘s look at the ways they can equip you for the job.

Helpful DIY Support From AutoZone

AutoZone may not get hands-on to install your new plugs. But their experts can set you up with everything needed to tackle this maintenance task yourself.

Here are some of the key ways AutoZone helps drivers change their own spark plugs:

• Vehicle-specific recommendations – Tell store staff your make/model/engine and they can look up the approved replacement plugs for your car. This ensures optimal fit and performance.

• Step-by-step guidance – AutoZone provides detailed DIY instructions both in-store and online. Their tips help you avoid rookie mistakes.

• Correct tools – Specialty tools like spark plug socket sets, gap gauges, and extenders make the job much simpler. AutoZone stocks these to rent or purchase.

• High quality parts – Choose from top brands like Bosch, NGK, ACDelco for the right spark plugs to meet your vehicle specifications.

• Warranty – Many plugs come with a 1-2 year warranty for peace of mind. AutoZone‘s Protection Plan also covers DIY installation mistakes.

With AutoZone‘s support, a DIY spark plug replacement is totally achievable. Their experts give you the parts knowledge plus instructions to get the job done right.

DIY Spark Plug Replacement – Step-By-Step

If you‘re willing to get your hands a little dirty, spark plug replacement is not as tough as it may seem. Here is an overview of the process:

Gather supplies:

• Spark plug socket set with rubber gasket grabber
• Socket wrench and extension bar for reach
• Anti-seize compound
• Gap gauge and adjustment tool
• Clean rags
• Gloves

Safely access the plugs:

• Refer to repair guides to locate the plugs in your engine’s cylinder head.
• Disconnect the battery ground cable before starting.
• Allow the engine ample time to cool before attempting removal.

Remove old plugs:

• Use your socket wrench with the spark plug socket attached to unscrew the old plugs. Turn counterclockwise.
• Turn slowly and gently to avoid damaging the aluminum threads.
• Carefully pull out each plug. Be aware they may still be hot!

Inspect and clean:

• Look over the used spark plugs for damage like cracked insulators or excessive electrode wear. This can indicate issues needing repair.
• Clean out the spark plug wells to remove oil or debris.

Install new plugs:

• Apply a small amount of anti-seize compound to the plug threads. This prevents corrosion bonding.
• Use a feeler gauge to check and adjust air gap to the proper specification.
• Carefully thread in each new plug by hand until snug, then use the wrench to tighten.
• Reconnect all ignition components and the battery cable.

Start up and test:

• With all plugs changed, start the engine and let it run for a few minutes.
• Check for any misfires, rough running, or other abnormalities.
• Take a test drive to confirm engine is running smoothly.

With the right parts and AutoZone‘s tips, you can gain confidence changing your own spark plugs. It takes some time and care, but doing it yourself will save a lot of money over a shop.

How Often Should You Change Them?

Spark plug replacement intervals vary across vehicle makes and models. According to statistics from RepairPal, the average for most modern engines falls around 60,000 miles.

However, your owner‘s manual should be consulted for the recommended interval for your specific automobile. Driving habits can also impact replacement frequency. Here are some general guidelines:

• 30,000 miles – Typical interval for older vehicles, performance engines, frequent short trips

• 60,000 miles – Common for newer models under normal driving

• 90-100,000 miles – Possible to extend up to for some modern engines and plugs; confirm with manual

Tracking your mileage is the best way to know when you’re due for new plugs. But also watch for common signs of spark plug wear like misfires, rough idle, and difficulty starting.

How Much Does Spark Plug Replacement Cost?

One benefit of a DIY job is the cost savings over a professional shop. Here‘s a comparison of parts and labor costs:

As you can see, providing your own labor reduces the cost significantly. AutoZone has high quality plugs available at reasonable prices. For example:

• Bosch Platinum plugs – $15 each ($60 per set of 4)
• NGK Iridium plugs – $8 each ($32 per set of 4)
• ACDelco Rapidfire Plugs – $4 each ($16 per set of 4)

Buying the right plugs and tools from AutoZone gives you substantial savings. With practice, you can handle this routine maintenance yourself.

Other Retailers That Replace Spark Plugs

While AutoZone doesn’t offer installations, Drivers can purchase parts and get spark plug replacement service through:

• Pep Boys – Visit their Service & Tires centers. Average cost around $150.

• Meineke – They advertise plug services starting at $79.99.

• Midas – Estimates start at $150 but may run higher.

• Firestone – Has over 2,000 locations nationwide to get plugs changed.

• Dealerships – New car dealers can handle replacement but tend to be more expensive.

• Local repair shops – Good option for those who want a mechanic they know and trust.

Even with professional installation, buying quality plugs at AutoZone can give you cost savings versus dealership or shop prices.

Don‘t Ignore Signs You Need New Spark Plugs

Because they are so vital to engine operation, it‘s critical not to overlook symptoms of failing spark plugs. Some telltale signs include:

• Hard starting or rough idle

• Misfires, hesitation, or lack of power

• Check engine light remains on

• Increased fuel consumption and emissions

• Difficulty accelerating

• Occasional stalling or complete failure to start

These warning signs mean worn out spark plugs are no longer firing correctly. Continuing to drive with bad plugs risks engine damage or breakdowns. Schedule your spark plug service as soon as issues arise.

Let AutoZone Equip You for Spark Plug DIY

In summary, while AutoZone doesn‘t provide repairs, they give DIYers the products and advice for maintenance jobs like spark plug changes. Their experts can look up the right parts specifically for your vehicle. Combined with quality plugs, tools, and instructions, AutoZone sets you up for success.

With some mechanical skill and confidence, you can handle spark plug replacement yourself. AutoZone empowers car owners to complete this essential maintenance, save money, and keep their vehicle running strong.