2022 Chevrolet Malibu Spark Plug Type & Gap

Quick reference

Why the right plug matters

Spark plugs are vital components in your 2022 Chevrolet Malibu's ignition system, responsible for igniting the air-fuel mixture in the combustion chamber. Using the correct spark plug type, heat range, and gap is crucial for optimal engine performance, fuel efficiency, and longevity.

Heat Range: The heat range refers to the spark plug's ability to dissipate heat from the combustion chamber. A plug that's too "cold" (dissipates heat too quickly) can lead to fouling, while a plug that's too "hot" (retains heat too long) can cause pre-ignition and engine damage. Your Malibu's engine is designed for a specific heat range, and using anything else can negatively impact performance.

Electrode Material: Modern spark plugs utilize various electrode materials, each with distinct advantages:

• Iridium: The most common choice for modern engines, including your Malibu. Iridium plugs offer exceptional durability and a fine-wire electrode, promoting a strong, consistent spark. They typically have longer replacement intervals.
• Platinum: While not as long-lasting as iridium, platinum plugs still offer good durability and improved performance over copper plugs. They are often used as an OEM alternative to iridium in some applications.
• Copper: Historically, copper plugs were standard. They conduct electricity very well but wear quickly due to their softer composition. They are rarely found in modern, high-performance engines like those in the Malibu, which demand longer service intervals.

How to gap a spark plug

While many modern iridium spark plugs come pre-gapped, it's always a good idea to verify the gap before installation, especially for the 2022 Chevrolet Malibu. An incorrect gap can lead to misfires, reduced fuel economy, and poor engine performance.

1. Obtain a gap tool: Use a wire-type spark plug gapping tool or a feeler gauge. Avoid coin-style gappers, as they can damage the fine-wire electrodes of iridium plugs.
2. Check the gap: Carefully insert the appropriate wire gauge or feeler blade into the gap between the center and ground electrodes. It should slide in with a slight drag.
3. Adjust if necessary: If the gap is too small, gently bend the ground electrode outwards with the gapping tool. If the gap is too large, gently tap the ground electrode on a clean, solid surface to close it. Be extremely careful not to damage the delicate center electrode.
4. Re-check: Always re-check the gap after any adjustment to ensure it is within the specified range.

Replacement procedure tips

Replacing spark plugs on your 2022 Chevrolet Malibu is a manageable task for the DIY mechanic, but it requires care and attention to detail. Both the 1.5L LFV and 2.0L LTG engines utilize a coil-on-plug ignition system.

1. Gather your tools: You'll need a torque wrench, spark plug socket (typically 5/8"), extensions, a swivel joint, a dielectric grease, and possibly compressed air.
2. Access the plugs: Carefully remove any engine covers or components obstructing access to the ignition coils.
3. Coil-on-plug removal: Disconnect the electrical connector from each ignition coil. Then, gently twist and pull each coil upwards to remove it from the spark plug well. Avoid pulling on the wires.
4. Clean the area: Before removing the old plugs, use compressed air to blow out any debris from around the spark plug wells. This prevents foreign material from falling into the combustion chamber when the old plug is removed.
5. Remove old plugs: Use your spark plug socket and extension to carefully loosen and remove each spark plug. Turn counter-clockwise. Be mindful of potential resistance and stop if excessive force is needed.
6. Anti-seize debate: There's ongoing discussion about using anti-seize on spark plug threads. For modern spark plugs with nickel-plated shells, manufacturers like NGK often advise against anti-seize, as it can alter torque readings and potentially lead to over-tightening. Follow the spark plug manufacturer's recommendations. If you do choose to use it, apply a very thin coat to the threads, avoiding the electrode.
7. Install new plugs: Thread the new spark plugs in by hand first to avoid cross-threading. Once they are finger-tight, use a torque wrench to tighten them to the specified torque value (18 lb-ft / 25 Nm). Over-tightening can damage the plug or the cylinder head threads, while under-tightening can lead to misfires or plug ejection.
8. Dielectric grease: Apply a small amount of dielectric grease inside the boot of each ignition coil before reinstalling them. This helps prevent moisture entry and ensures a good electrical connection.
9. Reinstall coils and covers: Push each ignition coil firmly back onto its respective spark plug until it clicks into place. Reconnect the electrical connectors and reinstall any removed engine covers.

Known issues

Fortunately, the 2022 Chevrolet Malibu's engines (1.5L LFV and 2.0L LTG) are not known for specific, widespread spark plug-related issues like the Ford 3-valve engine's propensity for two-piece plug breakage. Adhering to the recommended service intervals and using the correct spark plugs will ensure reliable operation.

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