2023 Honda Pilot Spark Plug Type & Gap

Quick reference

Why the right plug matters

Choosing the correct spark plug for your 2023 Honda Pilot is crucial for optimal engine performance, fuel efficiency, and emissions. There are several factors that make a plug "right" for an engine, including its heat range, electrode material, and gap.

Heat Range: This refers to the plug's ability to dissipate heat. A "cold" plug dissipates heat quickly, while a "hot" plug retains more heat. Using a plug with the wrong heat range can lead to pre-ignition (too hot) or fouling (too cold). For the 2023 Honda Pilot's 3.5L V6, the specified NGK DILKAR7C11H is designed with the appropriate heat range to maintain optimal combustion temperatures.

Electrode Metal: Spark plugs come in various electrode materials, each with its own advantages:

• Iridium: These are the most common type for modern vehicles like the 2023 Pilot. Iridium is extremely hard and has a very high melting point, allowing for a finer center electrode. This results in a stronger, more consistent spark, improved fuel economy, and a significantly longer lifespan (typically 100,000 miles or more). The OEM NGK DILKAR7C11H is an iridium plug.
• Platinum: Platinum plugs offer good durability and performance, often lasting around 60,000 to 80,000 miles. They are an upgrade from traditional copper plugs but not as long-lasting as iridium.
• Copper: These are the most basic and least expensive plugs. Copper is an excellent conductor of electricity but is relatively soft and wears down quickly. They typically only last 20,000 to 30,000 miles and are generally not recommended for modern engines like the Pilot's, which are designed for longer-lasting iridium plugs.

How to gap a spark plug

The gap between the center and ground electrodes is critical for a strong spark. For the 2023 Honda Pilot, the recommended gap is 0.044 inches (1.1 mm). While iridium plugs are generally pre-gapped from the factory, it's always a good idea to double-check the gap before installation. However, exercise extreme caution when gapping iridium plugs, as their fine electrodes can be easily damaged.

To gap a spark plug:

1. Use a wire-type spark plug gapping tool: These tools are designed to measure the gap accurately without damaging the electrode.
2. Gently bend the ground electrode: If the gap needs adjustment, carefully bend only the ground electrode (the L-shaped arm) with the gapping tool. Never try to bend the center electrode.
3. Re-check the gap: Ensure the tool slides through with a slight drag at the specified gap.

Replacement procedure tips

Replacing spark plugs on your 2023 Honda Pilot is a manageable DIY task for those with some mechanical experience. Here are some tips specific to the 3.5L V6 engine:

• Coil-on-Plug (COP) system: The 2023 Pilot utilizes a coil-on-plug ignition system. This means each spark plug has its own ignition coil directly mounted above it. To access the spark plugs, you'll need to disconnect the electrical connector from each coil and then unbolt and remove the coil. Be gentle with the electrical connectors, as they can become brittle over time.
• Accessing Rear Plugs: The rear bank of cylinders (closest to the firewall) can be more challenging to access due to limited space. You might need to remove some intake components or other accessories to gain better access. Always refer to your vehicle-specific service manual for detailed instructions.
• Anti-seize debate: There's ongoing debate about using anti-seize compound on spark plug threads. Honda and NGK generally recommend against using anti-seize on modern spark plugs with nickel-plated shells, as it can alter torque readings and potentially lead to over-tightening or damage. The nickel plating provides adequate corrosion resistance.
• Dielectric grease on boots: Applying a small amount of dielectric grease inside the spark plug boots (the rubber part that connects to the coil) can help prevent moisture intrusion and make future removal easier. Be careful not to get grease on the electrode, as this can interfere with the spark.
• Torque Spec: Always adhere to the recommended torque specification of 13 lb-ft (18 Nm). Over-tightening can damage the spark plug or the cylinder head threads, while under-tightening can cause the plug to loosen and lead to misfires.

Known issues

Fortunately, the 2023 Honda Pilot's 3.5L V6 engine (J35Y8) is not known for specific spark plug related issues such as cracked porcelain or broken plug shells that plagued some other manufacturers in the past (e.g., Ford's problematic 3-valve engines).

The primary concern with modern iridium plugs is ensuring they are replaced at the recommended interval and that the correct OEM or equivalent quality aftermarket plug is used. Using incorrect plugs or improper installation can lead to performance issues or premature wear.

Need plugs replaced? Find a shop on Repairius.