2022 Ford F-250 Super Duty Spark Plug Type & Gap

Quick reference

Why the right plug matters

Choosing the correct spark plug for your 2022 Ford F-250 Super Duty is crucial for optimal engine performance, fuel efficiency, and longevity. Spark plugs are not a "one size fits all" component; variations in heat range, electrode material, and gap significantly impact their function. The "heat range" of a spark plug refers to its ability to dissipate heat. A plug that's too "hot" (dissipating heat slowly) can lead to pre-ignition and detonation, damaging the engine. Conversely, a plug that's too "cold" (dissipating heat too quickly) can foul with carbon deposits, leading to misfires.

The electrode material also plays a vital role. Older vehicles often used copper plugs, which offer excellent conductivity but have a shorter lifespan. Platinum and iridium plugs, common in modern vehicles like your F-250, are more expensive but offer significantly extended service intervals due to their harder, more durable electrode materials. Iridium is the hardest and offers the longest life, making it ideal for the long intervals seen in today's vehicles.

How to gap a spark plug

Properly gapping a spark plug creates the ideal distance between the center and ground electrodes for the spark to jump. An incorrect gap can lead to misfires, reduced fuel economy, and poor engine performance. For your 2022 F-250, verifying the gap is important, especially with some aftermarket plugs. Use a wire-style spark plug gap tool for accuracy. If adjustment is needed, gently bend the ground electrode. Never pry or bend the center electrode, as this can damage the plug.

Replacement procedure tips

The 2022 F-250 Super Duty uses a coil-on-plug (COP) ignition system, meaning each spark plug has its own ignition coil mounted directly over it. This eliminates the need for spark plug wires and improves ignition timing precision. To replace the spark plugs:

1. Disconnect the negative battery terminal: Always do this before working on electrical components.
2. Remove the ignition coils: Carefully disconnect the electrical connector from each coil, then unbolt and remove the coil. Be gentle to avoid damaging the connectors or the coil boots.
3. Clean around the spark plug: Before removing the old plugs, use an air compressor or vacuum to clear any debris from around the spark plug wells. This prevents foreign material from falling into the combustion chamber once the plug is removed.
4. Remove the old spark plugs: Use a spark plug socket with an extension. Turn counter-clockwise to loosen.
5. Anti-seize debate: There's ongoing debate about using anti-seize on modern spark plugs. Many plug manufacturers, particularly NGK, advise against it, stating that their plugs are coated to prevent seizing and anti-seize can alter torque readings, leading to over-tightening. Ford's official stance for many modern engines also advises against it. If you choose to use it, apply a very thin coat to the threads, avoiding the electrode.
6. Install new spark plugs: Thread the new plugs in by hand to avoid cross-threading. Once finger-tight, use a torque wrench to tighten to the manufacturer's specifications. Over-tightening can damage the plug or the cylinder head threads.
7. Dielectric grease: Apply a small amount of dielectric grease to the inside of the ignition coil boots before re-installing them. This helps seal out moisture, prevents corrosion, and makes future removal easier.
8. Reinstall coils and reconnect battery: Ensure all coil connectors are secure and then reconnect the battery.

Known issues

Fortunately, both the 6.2L V8 "Boss" and the 7.3L V8 "Godzilla" engines in the 2022 Ford F-250 Super Duty do not have widespread, notorious spark plug issues like the earlier Ford 3-valve engines did with their problematic two-piece spark plugs prone to breakage. You can generally expect a straightforward spark plug replacement process if you follow proper procedures and use the correct plugs.

Need plugs replaced? Find a shop on Repairius.