2019 Chevrolet Equinox Spark Plug Type & Gap

Quick reference

Why the right plug matters

Choosing the correct spark plug for your 2019 Chevrolet Equinox is crucial for optimal engine performance, fuel efficiency, and longevity. Spark plugs are not a universal part; they are engineered with specific heat ranges, electrode materials, and designs to meet the demands of a particular engine. Using the wrong plug can lead to misfires, reduced power, poor fuel economy, and even engine damage.

Heat Range: The heat range refers to the spark plug's ability to dissipate heat from the combustion chamber. A "cold" plug dissipates heat quickly and is used in high-performance or forced-induction engines (like your Equinox's turbo engines) to prevent pre-ignition. A "hot" plug retains more heat and is suitable for engines that run cooler. Using a plug that's too hot can cause overheating and detonation, while one that's too cold can lead to fouling.

Electrode Metal: The material of the spark plug electrode significantly impacts its lifespan and performance:

• Iridium: These are the most common type for modern vehicles like the Equinox. Iridium is extremely hard and has a very high melting point, allowing for fine-wire electrodes that provide a more focused and efficient spark. This results in longer service intervals (typically 100,000 miles or more) and improved ignition reliability.
• Platinum: Platinum plugs offer good durability and improved performance over copper, with service intervals around 60,000 to 80,000 miles. They are also available in double-platinum versions for even longer life.
• Copper: Copper plugs have a large copper core for excellent conductivity but an electrode made of nickel alloy, which wears faster. They are typically found in older vehicles or those with more frequent replacement intervals, usually around 30,000 miles. Your Equinox, with its modern turbocharged engines, exclusively uses iridium plugs from the factory.

How to gap a spark plug

The gap between the center and ground electrodes is critical for a strong and consistent spark. 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 if you're not using OEM plugs. The recommended gap for both the 1.5L and 2.0L turbocharged engines in your 2019 Equinox is 0.032 inches (0.8 mm).

To gap a spark plug:

1. Use a wire-type spark plug gapping tool: These tools are more accurate for modern fine-wire electrodes than older coin-style gauges, which can damage the delicate iridium tip. Slide the appropriate wire gauge between the electrodes.
2. Adjust carefully: If the gap is too small, gently pry the ground electrode very slightly outwards with the gapping tool. If the gap is too wide, gently tap the ground electrode on a hard, non-abrasive surface to close the gap. Avoid bending the center electrode.
3. Re-check: Always re-check the gap after making any adjustments to ensure it meets the manufacturer's specification.

Replacement procedure tips

Replacing the spark plugs on your 2019 Chevrolet Equinox, regardless of engine, will involve similar steps due to the coil-on-plug ignition system. This system eliminates traditional spark plug wires, with an ignition coil mounted directly on top of each spark plug.

1. Engine Cool Down: Always ensure the engine is completely cool before attempting to remove spark plugs. This prevents stripping the threads in the cylinder head, which are made of aluminum.
2. Coil-on-Plug Removal: Carefully disconnect the electrical connector from each ignition coil. Then, gently twist and pull each coil straight up to remove it from the spark plug. Avoid yanking on the wires. Inspect the coil boots for any cracks or signs of wear.
3. Cleaning: Before removing the old spark plugs, use compressed air to blow any debris from around the spark plug wells. This prevents dirt and grime from falling into the combustion chamber when the old plugs are removed.
4. Anti-Seize Debate: There's ongoing debate about using anti-seize on modern spark plugs. For your 2019 Equinox, which likely has nickel-plated spark plug threads, most manufacturers (including ACDelco, NGK, and Denso) recommend not using anti-seize. The nickel plating provides adequate anti-seize properties, and adding more can affect the torque readings, potentially leading to over-tightening and damage. Refer to the spark plug manufacturer's specific recommendations.
5. Dielectric Grease: Apply a small amount of dielectric grease (silicone grease) to the inside of the spark plug boots before reinstalling the ignition coils. This helps prevent moisture entry, insulates against voltage leaks, and makes future removal easier.
6. Torque Wrench: Always use a torque wrench to tighten the new spark plugs to the manufacturer's specified torque value (13 lb-ft / 18 Nm for both engines). Over-tightening can strip cylinder head threads or damage the spark plug, while under-tightening can lead to compression leaks and misfires. The 2019 Equinox does not have any known inherent issues with spark plug breakage like some other Ford or GM engines, so proper torque is your main concern.

Known issues

Fortunately, the 2019 Chevrolet Equinox with either the 1.5L or 2.0L turbocharged engine does not have widespread, well-documented spark plug-related "known issues" such as the problematic two-piece spark plug design in some Ford 3-valve engines or ionization-sensing coil problems found in certain GM 5.3L engines. As long as you use the correct iridium-tipped spark plugs, maintain proper gapping, and adhere to the recommended replacement intervals and torque specifications, your Equinox's ignition system should provide reliable service.

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