2024 Toyota Tundra Spark Plug Type & Gap

Quick reference

Why the right plug matters

Choosing the correct spark plug for your 2024 Toyota Tundra is crucial for optimal engine performance, fuel efficiency, and longevity. The spark plug is responsible for igniting the air-fuel mixture in your engine's cylinders, and an incorrect plug can lead to a host of problems.

Heat Range: Spark plugs are designed with a specific "heat range," which refers to their ability to dissipate heat from the combustion chamber. A "hotter" plug retains more heat, while a "colder" plug dissipates heat more quickly. Using a plug that is too hot can lead to pre-ignition and detonation, damaging the engine. A plug that is too cold can cause carbon fouling, leading to misfires and poor performance. The factory-specified plugs for your Tundra are chosen to maintain the optimal operating temperature in the combustion chamber.

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

• Iridium: This is the most common and recommended material for modern vehicles like the Tundra. Iridium is extremely hard and has a very high melting point, allowing for fine-wire electrodes that produce a strong, consistent spark. Iridium plugs offer exceptional durability and a long service life, often exceeding 60,000 miles.
• Platinum: Platinum plugs are also durable, offering a longer lifespan than copper plugs. They are a good option for many vehicles but generally don't last as long as iridium.
• Copper: While copper is an excellent conductor of electricity, it is a soft metal and wears down quickly. Copper plugs are typically found in older vehicles or high-performance applications where frequent replacement is expected. They are not recommended for your 2024 Toyota Tundra.

How to gap a spark plug

Properly gapping your spark plugs ensures the correct spark intensity for efficient combustion. While many iridium plugs come pre-gapped and are fragile, it's always a good idea to double-check.

1. Obtain a gap gauge: Use a wire-type gap gauge for iridium plugs, as a flat-style gauge can damage the fine electrode.
2. Check the gap: Slide the appropriate wire gauge between the center and ground electrodes. There should be a slight drag.
3. Adjust if necessary: If the gap is too small, carefully bend the ground electrode slightly outward with the bending tool on the gauge. If the gap is too large, gently tap the ground electrode on a hard surface to close it. Be extremely gentle with iridium electrodes to avoid damage.

Replacement procedure tips

Replacing spark plugs on your 2024 Toyota Tundra, particularly with its modern coil-on-plug ignition system, requires care and attention.

1. Coil-on-plug removal: Each spark plug has its own ignition coil directly mounted on top. To access the plugs, you'll need to disconnect the electrical connector from each coil and then unbolt and carefully remove the coil. Be gentle to avoid damaging the electrical connectors or the coil boots.
2. Anti-seize debate: There is ongoing debate about using anti-seize on spark plug threads. For modern plugs with specialized coatings, manufacturers often advise against it, as it can alter the torque readings and potentially lead to over-tightening. Follow the spark plug manufacturer's recommendations. If you choose to use anti-seize, apply a very thin coat and reduce the torque specification by about 20%.
3. Dielectric grease on boots: Apply a small amount of dielectric grease inside the spark plug boots (the part that connects to the top of the spark plug). This helps to seal out moisture, prevents corrosion, and makes future removal easier.
4. Torque matters: Always use a torque wrench to tighten spark plugs to the specified value (13 lb-ft / 18 Nm). Over-tightening can damage the spark plug, cylinder head threads, or even crack the porcelain insulator. Under-tightening can lead to misfires or the plug backing out.

Known issues

The 2024 Toyota Tundra's powertrain, featuring the V35A-FTS and V35A-FTV engines, is relatively new. While there aren't widespread "known issues" specifically related to spark plugs like older Ford 3-valve engines with their notorious two-piece plugs, it's always good practice to observe for common symptoms of spark plug problems such as:

• Engine misfires or rough idle
• Reduced fuel economy
• Lack of acceleration or power
• Check Engine Light illumination

Need plugs replaced? Find a shop on Repairius.