2021 Honda CR-V: Spark Plug Type, Gap & Torque

Quick reference

Why the right plug matters

The spark plug is a small but critical component in your engine. It's responsible for igniting the air-fuel mixture that powers your car. Using the correct spark plug is essential for optimal engine performance, fuel economy, and emissions. The most important factors to consider when choosing a spark plug are heat range, electrode metal, and design.

• Heat range: This refers to the spark plug's ability to dissipate heat. A plug that is too "hot" can overheat and cause pre-ignition, while a plug that is too "cold" can foul and misfire. The correct heat range is determined by the engine's design and operating conditions.
• Electrode metal: The electrode is the part of the spark plug that creates the spark. The choice of metal affects the plug's performance and lifespan.
  • Iridium: Iridium is a very hard and durable metal that is an excellent electrical conductor. Iridium plugs offer the best performance and longest lifespan, typically lasting up to 100,000 miles.
  • Platinum: Platinum is another long-lasting metal that offers good performance. Platinum plugs are a good mid-range option and can last up to 60,000 miles.
  • Copper: Copper is a good conductor but wears out more quickly than iridium or platinum. Copper plugs are the most affordable option but need to be replaced more frequently, typically every 20,000-30,000 miles.
• Design: Spark plugs come in a variety of designs, such as a traditional-style plug with a single ground electrode or a multi-ground electrode plug. The 2021 Honda CR-V uses a modern coil-on-plug ignition system, which eliminates the need for a distributor.

How to gap a spark plug

The gap is the distance between the center and ground electrodes. It is critical for proper ignition. If the gap is too small, the spark may be too weak to ignite the air-fuel mixture. If the gap is too large, the spark may not be able to jump the gap at all.

To gap a spark plug, you will need a spark plug gapping tool. These are inexpensive and can be found at any auto parts store.

1. First, check the correct gap specification for your vehicle in the table above.
2. Next, insert the gapping tool between the electrodes.
3. If the gap is too small, gently bend the ground electrode up until the correct gap is achieved. If the gap is too large, gently tap the ground electrode on a hard surface to close the gap.
4. Be very careful not to damage the center electrode or the porcelain insulator.

Replacement procedure tips

Replacing spark plugs is a relatively easy job that can be done with basic hand tools. Here are a few tips specific to the 2021 Honda CR-V:

• Coil-on-plug removal: The 2021 CR-V has a coil-on-plug ignition system. This means that each spark plug has its own ignition coil. To remove the coil, you will need to disconnect the electrical connector and then unbolt the coil from the valve cover. Once the coil is removed, you can access the spark plug.
• Anti-seize debate: There is some debate over whether or not to use anti-seize on spark plug threads. Some manufacturers, like NGK, advise against it because their plugs have a special coating that prevents seizing. However, many technicians still recommend using a small amount of anti-seize to make a future plug change easier. If you do use anti-seize, be sure to use it sparingly and avoid getting any on the electrodes.
• Dielectric grease on boots: It is a good idea to apply a small amount of dielectric grease to the inside of the spark plug boot before reinstalling the ignition coil. This will help to seal out moisture and prevent corrosion.

Known issues

There are no widespread known issues with the spark plugs on the 2021 Honda CR-V. However, it's worth noting that some older Ford 3-valve engines were notorious for spark plugs breaking off in the cylinder head during removal. This was due to a two-piece plug design that was prone to seizing. Fortunately, this is not an issue on the CR-V.

Need plugs replaced? Find a shop on Repairius.