2019 Nissan Titan Spark Plug Type & Gap

Quick reference

Why the right plug matters

Choosing the correct spark plug for your 2019 Nissan Titan is crucial for optimal engine performance, fuel efficiency, and longevity. Spark plugs are not a "one-size-fits-all" component, and using the wrong type can lead to misfires, reduced power, 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 from the combustion chamber. A "hot" plug retains more heat, while a "cold" plug dissipates more. The correct heat range for your Titan's 5.6L V8 engine is carefully determined by the manufacturer to ensure the plug tip stays at an optimal temperature. Too hot, and the plug can overheat, leading to pre-ignition and detonation. Too cold, and carbon deposits can form, causing misfires.

Electrode metal

The material used for the spark plug electrodes significantly impacts its lifespan and performance. The 2019 Nissan Titan 5.6L V8 primarily uses iridium spark plugs.

• Iridium: This is the most common and advanced material for modern spark plugs. Iridium is extremely hard and has a very high melting point, allowing for fine-wire electrodes that provide a strong, consistent spark and exceptional durability. Iridium plugs typically last 100,000 miles or more, which aligns with the recommended interval for your Titan.
• Platinum: Platinum plugs are a step up from copper, offering better longevity and performance. They are often used in engines that require a longer service interval than copper, but generally not as long-lasting as iridium.
• Copper: Copper plugs are the most basic and economical. While copper is an excellent conductor, it's a softer metal, so copper electrodes are thicker and wear out faster. They are not recommended for your 2019 Nissan Titan, as they would require much more frequent replacement and may not provide optimal performance.

How to gap a spark plug

The gap between the center and ground electrodes of a spark plug is critical for proper ignition. The 2019 Nissan Titan 5.6L V8 requires a gap of 0.043 inches (1.1 mm). Even though many modern iridium plugs come pre-gapped, it's always a good practice to double-check the gap before installation.

To gap a spark plug, you'll need a spark plug gap tool, typically a wire-type gauge. Gently slide the appropriate wire gauge between the electrodes. If the gap is too small, you can carefully bend the ground electrode outwards with the tool. If the gap is too wide, gently tap the ground electrode on a hard surface to close it slightly. Be extremely careful not to touch or bend the fine-wire iridium center electrode, as it is very delicate and easily damaged.

Replacement procedure tips

Replacing spark plugs on your 2019 Nissan Titan's 5.6L V8 engine is a manageable DIY task for those with some mechanical experience. However, a few tips can make the process smoother:

• Coil-on-plug removal: Your Titan uses a coil-on-plug (COP) ignition system. Each spark plug has its own ignition coil directly mounted on top of it. To access the plugs, you'll need to disconnect the electrical connector from each coil and then remove the coil mounting bolt (usually a 10mm). Gently twist and pull the coil straight up to remove it from the spark plug well. Avoid yanking on the electrical wires.
• Anti-seize debate: There's a long-standing debate about using anti-seize lubricant on spark plug threads. For spark plugs with nickel-plated shells, like the NGK DILKAR7B11, manufacturers often advise against using anti-seize. The plating itself acts as an anti-seize, and adding more can over-lubricate the threads, leading to over-tightening and potential damage to the cylinder head threads or the spark plug itself. Always refer to the spark plug manufacturer's recommendations. If you do choose to use anti-seize (sparingly, and only on the threads, never on the electrodes), reduce the torque specification by about 10-20%.
• Dielectric grease on boots: Applying a small amount of dielectric grease inside the spark plug boot (the rubber part of the ignition coil that connects to the spark plug) can make future removal easier and help prevent moisture intrusion. Be careful not to get any grease on the electrodes of the spark plug.
• Torque specs: Always use a torque wrench to tighten spark plugs to the specified range of 14-22 lb-ft (19-30 Nm). Overtightening can strip cylinder head threads or damage the spark plug, while undertightening can allow combustion gases to escape, leading to misfires and potential damage to the coil.

Known issues

Fortunately, the 2019 Nissan Titan 5.6L V8 engine (VK56VD) does not have widely reported or notorious spark plug-related issues akin to the Ford 3-valve engine's breakage problems. Nissan's design for this engine is generally robust in this regard, especially when the correct NGK iridium spark plugs are used and replaced at the factory-recommended intervals.

Need plugs replaced? Find a shop on Repairius.