2024 Honda Pilot Spark Plug Type & Gap

Quick reference

Why the right plug matters

Choosing the correct spark plug for your 2024 Honda Pilot is crucial for optimal engine performance, fuel efficiency, and longevity. Spark plugs are not a "one-size-fits-all" component; various factors, including heat range, electrode material, and gap, are engineered specifically for your engine's design and operating conditions.

Heat Range: This refers to the plug's ability to dissipate heat from the combustion chamber. A plug that is too "cold" (dissipates too much heat) can lead to fouling and misfires, while a plug that is too "hot" (dissipates too little heat) can cause pre-ignition and engine damage. The NGK DILKAR7C11 specified for the 3.5L V6 engine in your Pilot is carefully designed with the correct heat range.

Electrode Metal: The material used for the center and ground electrodes significantly impacts a plug's lifespan and performance characteristics:

• Iridium: This is the most common material for modern engines like your Pilot's. Iridium plugs, such as the NGK DILKAR7C11, feature extremely fine electrodes for a concentrated spark, improved ignitability, and exceptional durability. They are designed for extended service intervals, often exceeding 100,000 miles.
• Platinum: Platinum plugs offer good durability and improved performance over copper, usually lasting around 60,000 miles. They are less common in new vehicles than iridium but can be found in some applications.
• Copper: Copper plugs are the traditional standard. While they offer excellent conductivity and a strong spark, their softer electrodes wear more quickly, necessitating more frequent replacement (typically every 30,000 miles). They are generally not recommended for your 2024 Honda Pilot.

How to gap a spark plug

The spark plug gap is the distance between the center and ground electrodes. An incorrect gap can lead to misfires, reduced fuel economy, and poor engine performance. For your 2024 Honda Pilot, the recommended gap is 0.044 inches (1.1 mm).

To gap a spark plug:

1. Use a wire-style or coin-style spark plug gap tool. Never use a ramp-style tool, as it can damage the delicate iridium electrode.
2. Slide the tool between the electrodes. If the gap is too small, gently bend the ground electrode outwards with the tool's adjuster. If the gap is too large, carefully tap the ground electrode on a hard, non-marring surface to close it slightly.
3. Ensure a slight drag when pulling the tool through the gap, indicating the correct measurement.
4. Double-check the gap several times to ensure accuracy.

It's important to note that many modern iridium spark plugs, including the NGK DILKAR7C11, come pre-gapped from the factory. While it's always a good idea to verify the gap, avoid adjusting them unless absolutely necessary, as the fine electrodes can be easily damaged.

Replacement procedure tips

Replacing spark plugs on your 2024 Honda Pilot's 3.5L V6 engine is a manageable DIY task, but careful attention to detail is essential:

• Coil-on-Plug (COP) System: Your Pilot utilizes a coil-on-plug ignition system, meaning each spark plug has its own individual ignition coil mounted directly above it. To access the spark plugs, you will need to carefully disconnect the electrical connector from each coil and then unbolt and remove the ignition coil.
• Cleanliness is Key: Before removing the old plugs, thoroughly clean the area around each spark plug hole with compressed air. This prevents dirt and debris from falling into the combustion chamber when the old plug is removed.
• Anti-Seize Debate: While some technicians advocate for anti-seize on spark plug threads, most modern spark plugs have a special coating that prevents seizing. Applying anti-seize can alter the torque readings, potentially leading to over-tightening and damage to the cylinder head threads. Honda (and NGK) generally recommend not using anti-seize on their plugs.
• Dielectric Grease on Boots: Apply a small amount of dielectric grease inside the spark plug boot (the end that connects to the spark plug). This helps seal out moisture, prevents corrosion, and makes future removal easier.
• Torque to Spec: Always use a torque wrench to tighten the new spark plugs to the manufacturer's specified torque of 13 lb-ft (18 Nm). Over-tightening can strip the cylinder head threads or crack the spark plug, while under-tightening can lead to compression leaks and premature plug wear.
• One Plug at a Time: To avoid mixing up ignition coil wires or components, work on one spark plug at a time, removing the old plug and installing the new one before moving to the next.

Known issues

The 2024 Honda Pilot's 3.5L V6 (J35Y8) engine is generally reliable, and there are no widespread, specific spark plug-related issues similar to the widely publicized problems with some Ford 3-valve engines (e.g., two-piece spark plug breakage). As long as you use the correct OEM or specified aftermarket spark plugs and adhere to the recommended replacement intervals and torque specifications, you should experience trouble-free operation.

Need plugs replaced? Find a shop on Repairius.