2020 Chevrolet Equinox Spark Plug Type & Gap

Quick reference

Why the right plug matters

Choosing the correct spark plug for your 2020 Chevrolet Equinox is crucial for optimal engine performance, fuel efficiency, and longevity. The "right plug" isn't just about fitting in the hole; it involves several key design elements:

• Heat Range: This refers to the plug's ability to dissipate heat from the combustion chamber. A plug that's too "cold" won't burn off deposits effectively, leading to fouling. A plug that's too "hot" can overheat, causing pre-ignition or knocking, which can severely damage your engine. The OEM specified plugs for your Equinox are carefully designed for the engine's operating temperature.
• Electrode Metal: Modern engines like those in the Equinox primarily use iridium spark plugs. Iridium is an extremely durable and hard metal that allows for very fine wire electrodes. This fine electrode design provides a sharper, more focused spark and resists wear much better than traditional nickel-alloy or even platinum plugs. You might occasionally see platinum plugs, which also offer good longevity but typically not as long as iridium. Copper plugs are excellent conductors but wear quickly and are generally not recommended for modern vehicles due to their shorter lifespan and the demanding ignition systems.

Using anything other than the specified iridium plugs for your 2020 Equinox can lead to misfires, reduced fuel economy, and premature plug wear, ultimately costing you more in the long run.

How to gap a spark plug

While most iridium spark plugs come pre-gapped from the factory, it's always a good practice to double-check the gap before installation. This is especially true for modern, fine-wire iridium plugs, where improper adjustments can easily damage the delicate electrode.

1. Obtain the correct gap specification: Refer to the "Quick reference" table above for your specific 2020 Equinox engine.
2. Use the correct tool: For iridium plugs, a wire-style or "coin" gap tool is recommended. Avoid using traditional ramp-style gap tools, as they can put undue stress on the fine iridium tip.
3. Gently check the gap: Slide the appropriate wire gauge or the edge of the coin gap tool between the center electrode and the ground electrode. There should be a slight drag.
4. Adjust if necessary (with caution): If adjustment is needed, only bend the ground electrode very gently using a specialized spark plug gapping tool that bends the ground strap. Never touch or attempt to bend the center iridium electrode, as it is very fragile and can break easily. Small adjustments are key.
5. Re-check the gap: After any adjustment, re-check to ensure it meets the specification.

Replacement procedure tips

Replacing spark plugs on your 2020 Chevrolet Equinox with either the 1.5L or 2.0L turbocharged engine is a moderately straightforward DIY task, but a few tips can make it smoother:

• Coil-on-Plug Removal: Both engines utilize a coil-on-plug (COP) ignition system. Each spark plug has its own individual ignition coil mounted directly on top. To access the spark plugs, you'll need to carefully disconnect the electrical connector from each coil and then remove the bolt (typically a 10mm) securing the coil to the valve cover. Gently twist and pull the coil straight up to remove it. Avoid prying against the valve cover or other components.
• Anti-Seize Debate: Historically, anti-seize compound was routinely applied to spark plug threads. However, for modern spark plugs with nickel-plated shells, like those specified for your Equinox, most manufacturers (including GM/ACDelco and NGK) do not recommend using anti-seize. The nickel plating provides adequate anti-seize properties, and applying additional anti-seize can act as a lubricant, leading to overtightening and potential damage to the cylinder head threads or the spark plug itself. Always follow the spark plug manufacturer's recommendations.
• Dielectric Grease on Boots: A small amount of dielectric grease can be applied to the inside of the spark plug boot (the rubber portion of the coil that fits over the spark plug). This helps to seal out moisture, prevents the boot from sticking to the porcelain of the spark plug, and makes future removal easier. Apply it sparingly and avoid getting it on the electrical terminals.
• Cool Engine: Always replace spark plugs when the engine is cool to prevent stripping the threads in the aluminum cylinder head.
• Torque Wrench is Essential: Given the aluminum cylinder heads on the Equinox, using a torque wrench is absolutely critical to prevent under or overtightening. Refer to the "Quick reference" table for the precise torque specifications.

Known issues

Fortunately, the 2020 Chevrolet Equinox engines (1.5L and 2.0L turbo) do not have widespread, notorious spark plug-related issues akin to the Ford 3-valve two-piece plug breakage or certain GM 5.3L engines with ionization-sensing coils that require specific plug types and gaps. However, general issues can arise if incorrect spark plugs are used or if maintenance is neglected:

• Misfires due to incorrect gap or worn plugs: If you start to experience rough idling, reduced power, or a check engine light with a misfire code, worn-out or improperly gapped spark plugs are a common culprit.
• Carbon buildup: Direct injection engines, like those in the Equinox, are susceptible to carbon buildup on intake valves, but less commonly directly on spark plugs if the correct heat range plugs are used and regular maintenance is performed.

Adhering to the recommended spark plug type, gap, and replacement interval with quality OEM or specified aftermarket parts will ensure your Equinox runs smoothly for many miles.

Need plugs replaced? Find a shop on Repairius.