2024 Chevrolet Malibu Spark Plug Type & Gap

Quick reference

Why the right plug matters

Choosing the correct spark plug for your 2024 Chevrolet Malibu is crucial for optimal engine performance, fuel efficiency, and longevity. Spark plugs are not "one size fits all." Key factors like heat range and electrode material directly impact how your engine runs.

Heat Range: This refers to the plug's ability to dissipate heat. A plug that's too "cold" can lead to carbon fouling, while a plug that's too "hot" can cause pre-ignition (pinging) and engine damage. The manufacturer-specified plug ensures the correct heat range for your engine's operating conditions.

Electrode Metal:

• Iridium: The most common and recommended material for modern vehicles, including your Malibu. Iridium plugs offer exceptional durability and a long service life, often exceeding 100,000 miles. They provide a consistent, powerful spark due to their fine-wire electrode.
• Platinum: A step up from copper, platinum plugs also offer good durability and improved performance over copper. They are often used as OEM plugs in some applications and typically last around 60,000 to 80,000 miles.
• Copper: While excellent conductors, copper plugs have a softer electrode material that wears down faster, leading to a shorter service life (typically 20,000-30,000 miles). They are not typically found as OEM in newer vehicles like the Malibu.

Using the recommended iridium spark plugs ensures you meet the factory's performance and maintenance expectations.

How to gap a spark plug

While most modern iridium spark plugs come pre-gapped from the factory, it's always a good idea to double-check the gap before installation, especially with aftermarket plugs. The 2024 Malibu's 1.5L LFV Turbo engine requires a specific gap of 0.030-0.032 inches (0.75-0.80 mm).

To gap a spark plug, you'll need a wire-type spark plug gapping tool:

1. Select the correct wire gauge: Find the wire on your gapping tool that matches the specified gap.
2. Insert the gauge: Gently slide the wire gauge between the center and ground electrodes.
3. Adjust if necessary:
   • If the gap is too small, use the gapping tool to gently bend the ground electrode outwards. Be very careful not to apply too much pressure or bend the center electrode.
   • If the gap is too large, gently tap the ground electrode on a clean, solid surface to close the gap slightly.
4. Re-check: Always re-check the gap after any adjustment to ensure it meets specifications.

Never use a coin-style gapping tool on iridium or platinum plugs, as it can damage the fine-wire electrode.

Replacement procedure tips

Replacing spark plugs on your 2024 Chevrolet Malibu's 1.5L LFV Turbo engine is a moderately straightforward DIY task, but proper technique is essential to avoid damage.

1. Cool Engine: Always work on a cool engine. Attempting to remove spark plugs from a hot engine can damage the cylinder head threads.
2. Access: The 1.5L LFV engine uses a coil-on-plug (COP) ignition system. You'll need to remove the engine cover, then carefully disconnect the electrical connector from each ignition coil and unbolt the coil to remove it, revealing the spark plug.
3. Clean Area: Before removing the old plugs, use compressed air to blow away any dirt or debris from around the spark plug wells. This prevents contaminants from falling into the combustion chamber when the old plug is removed.
4. Remove Old Plugs: Use a dedicated spark plug socket (typically 5/8" or 16mm, with a rubber insert to protect the porcelain) and a ratchet to carefully unscrew the old plugs. An extension may be necessary.
5. Anti-Seize Debate: There is ongoing debate about using anti-seize compound on spark plug threads. General Motors, like many manufacturers, typically recommends not using anti-seize on spark plugs with nickel-plated shells, as it can alter torque readings and potentially lead to over-tightening. Follow the plug manufacturer's or vehicle manufacturer's recommendations. If you choose to use it, apply a very thin coat to the threads, avoiding the electrode.
6. Install New Plugs: Hand-thread the new spark plugs into the cylinder head to prevent cross-threading. Once finger-tight, use a torque wrench to tighten them to the specified 18 lb-ft (24 Nm). Do not overtighten, as this can damage the cylinder head threads.
7. Dielectric Grease: Apply a small amount of dielectric grease inside the boot of each ignition coil before reinstallation. This helps prevent moisture entry and aids in future removal.
8. Reassemble: Reinstall the ignition coils, ensuring the electrical connectors "click" into place. Re-attach any removed components.

Known issues

The 2024 Chevrolet Malibu does not have widespread, commonly reported spark plug-related issues similar to the widely recognized problems of some other past models (like the Ford 3-valve 2-piece plug breakage). Modern GM engines, including the 1.5L LFV, generally have reliable ignition systems and spark plug longevity when proper maintenance is followed.

However, premature wear or fouling can occur if there are underlying engine issues, such as oil consumption, fuel system problems, or improper air-fuel mixture. Always address diagnostic trouble codes (DTCs) promptly.

Need plugs replaced? Find a shop on Repairius.