2022 Honda Odyssey Spark Plug Type & Gap

Quick reference

Why the right plug matters

Choosing the correct spark plug for your 2022 Honda Odyssey is crucial for optimal engine performance, fuel efficiency, and longevity. Spark plugs are essentially igniters, creating the spark that ignites the air-fuel mixture in your engine's cylinders. Using the wrong plug can lead to a cascade of problems, from misfires and reduced power to increased emissions and even engine damage.

Heat Range: Spark plugs are designed with a specific "heat range," which refers to their ability to dissipate heat. A plug that's too "hot" (dissipates heat slowly) can lead to pre-ignition and detonation, while a plug that's too "cold" (dissipates heat quickly) can foul up with carbon deposits. The OEM-specified NGK ILZKAR8H8S for your Odyssey's 3.5L V6 engine has the ideal heat range to maintain optimal combustion temperatures.

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

• Iridium: The recommended plug for your 2022 Honda Odyssey is typically an iridium plug. Iridium is an extremely hard and durable metal, allowing for a very fine-wire center electrode. This design produces a more concentrated and consistent spark, leading to better combustion and longer service intervals (often exceeding 100,000 miles).
• Platinum: Platinum plugs are also long-lasting, offering good performance and durability. They generally fall between iridium and copper plugs in terms of cost and lifespan.
• Copper: Copper plugs, while excellent conductors of electricity, have a much softer electrode material. This means they wear down faster and require more frequent replacement. While cheaper upfront, their shorter lifespan usually makes them less cost-effective for modern engines like your Odyssey's.

How to gap a spark plug

Properly gapping a spark plug creates the ideal distance between the center and ground electrodes for a strong, consistent spark. While many modern iridium plugs come pre-gapped and are not designed to be adjusted, it's always good practice to verify the gap, especially with aftermarket plugs. However, never attempt to adjust the gap on a fine-wire iridium plug as you can easily damage the delicate electrode. If the gap is incorrect on an iridium plug, it's best to replace it.

For plugs that can be gapped:

1. Use the right tool: A wire-type feeler gauge is the most accurate tool for gapping spark plugs. Avoid disc-style gauges, as they can be less precise.
2. Check the current gap: Carefully slide the correct thickness gauge wire between the center and ground electrodes. There should be a slight drag.
3. Adjust if necessary: If the gap is too small, use the gapping tool to gently bend the ground electrode outwards until the correct gap is achieved. If the gap is too wide, carefully tap the ground electrode on a clean, solid surface to close the gap. Always bend the ground electrode, never the center electrode.
4. Re-check: Verify the gap after any adjustments.

For your 2022 Honda Odyssey, the recommended gap is 0.031-0.035 inches (0.8-0.9 mm).

Replacement procedure tips

Replacing the spark plugs on your 2022 Honda Odyssey's 3.5L V6 (J35Y6) engine is a manageable DIY task, but it requires patience and attention to detail. Here are some tips:

1. Access: The Odyssey's V6 engine is transversely mounted, meaning accessing the rear bank of spark plugs (cylinders 1, 3, 5) can be more challenging. You might need to remove the intake manifold for better access, though some experienced DIYers can manage without. The front bank (cylinders 2, 4, 6) is more straightforward.
2. Cooling: Always work on a cool engine. Attempting to remove spark plugs from a hot engine can damage the cylinder head threads.
3. Coil-on-plug removal: Your Odyssey uses a coil-on-plug (COP) ignition system. Each spark plug has its own ignition coil directly mounted on top. To remove, disconnect the electrical connector by depressing the tab and pulling. Then, unbolt the coil (typically a 10mm bolt) and gently twist and pull to remove it from the spark plug well. Be careful not to pull on the wires.
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