2017 Honda Odyssey Spark Plug Type & Gap

Quick reference

Why the right plug matters

Choosing the correct spark plug for your 2017 Honda Odyssey is crucial for optimal engine performance, fuel efficiency, and longevity. The 3.5L V6 engine (J35A6) in your Odyssey is designed to run with specific spark plugs that meet its precise requirements. These requirements include the correct heat range, electrode material, and gap.

Heat Range: Spark plugs are designed with a specific "heat range" which dictates how quickly the plug dissipates heat from the combustion chamber. A plug that's too "cold" (dissipates heat too quickly) can lead to carbon fouling, while a plug that's too "hot" (dissipates heat too slowly) can cause pre-ignition or engine knocking, potentially damaging engine components. The NGK ILZKR7B-11S is a precisely engineered plug with the appropriate heat range for your Odyssey's engine.

Electrode Metal (Iridium vs. Platinum vs. Copper):

• Iridium: The OEM plug for your 2017 Honda Odyssey is an iridium-tipped plug. Iridium is an extremely durable and hard metal, allowing for very fine electrodes. This results in a stronger, more consistent spark, improved fuel efficiency, and significantly longer service intervals – typically 100,000 miles or more. They are the premium choice and recommended for your vehicle.
• Platinum: Platinum plugs are also durable and offer good longevity, often rated for 60,000-100,000 miles. They are generally less expensive than iridium plugs but may not offer the same level of performance and fuel efficiency due to their larger electrode size.
• Copper: Copper plugs have a soft copper core electrode. While they provide excellent conductivity, they wear relatively quickly due to their softer material. Copper plugs typically have shorter service intervals (around 20,000-30,000 miles) and are not suitable for your Odyssey, which is designed for long-life iridium plugs. Using copper plugs in an engine designed for iridium will lead to premature wear and potential performance issues.

How to gap a spark plug

While properly gapped spark plugs are critical, it is generally not recommended to gap iridium spark plugs like the ones specified for your 2017 Honda Odyssey. Iridium electrodes are very fine and delicate, and attempting to gap them with a traditional gapping tool can easily damage the tip, rendering the plug useless. OEM and high-quality aftermarket iridium plugs are pre-gapped from the factory to the correct specification. Always double-check the specified gap against the plug you receive, but if a new iridium plug is not gapped correctly, it's best to replace it rather than attempt to re-gap it.

For educational purposes, if you were to gap a non-iridium plug:

1. Use a wire-type spark plug gapping tool: These tools are more accurate than ramp-style or coin-style gauges.
2. Slide the wire gauge: Gently slide the correct size wire gauge between the center and ground electrodes.
3. Adjust carefully: If the gap is too small, use the gapping tool to gently bend the ground electrode outwards. If the gap is too large, gently tap the ground electrode on a hard, flat surface to close it. Make very small adjustments.
4. Re-check: Always re-check the gap after any adjustment.

Replacement procedure tips

Replacing the spark plugs on your 2017 Honda Odyssey's 3.5L V6 engine requires careful attention to detail. This engine uses a coil-on-plug (COP) ignition system.

1. Accessing the Plugs: The V6 engine in the Odyssey has three spark plugs easily accessible on the front bank and three on the rear bank, which are more challenging to reach. You will likely need to remove the intake manifold to access the rear bank plugs. This is a more involved procedure, so be prepared with the necessary tools and gaskets.
2. Coil-on-Plug Removal: Each spark plug has its own ignition coil directly on top of it. Carefully disconnect the electrical connector from each coil. Then, unbolt and gently pull straight up on the coil to remove it. Avoid twisting or prying, as this can damage the coil or the connector.
3. Cleaning the Plug Wells: Before removing the old spark plugs, it