2020 Toyota RAV4 Spark Plug Type & Gap

Quick reference

Why the right plug matters

Choosing the correct spark plug for your 2020 Toyota RAV4 is crucial for optimal engine performance, fuel efficiency, and longevity. The spark plug is responsible for igniting the air-fuel mixture in the combustion chamber. An incorrect plug can lead to misfires, reduced power, poor fuel economy, and even engine damage.

Key factors to consider include:

• Heat Range: Spark plugs are designed with a specific heat range, which refers to their ability to dissipate heat. A "hot" plug retains more heat, while a "cold" plug dissipates heat more quickly. Using a plug with an incorrect heat range can lead to pre-ignition (too hot) or fouling (too cold).
• Electrode Metal:
  • Iridium: These are the most common type for modern vehicles like the 2020 RAV4. Iridium plugs offer exceptional durability and a fine electrode, resulting in a strong, consistent spark and extended service life. The OEM plugs for your RAV4 are iridium-tipped.
  • Platinum: Platinum plugs are also durable and offer good performance, often lasting longer than copper plugs. They typically have a platinum disc welded to the center electrode.
  • Copper: Copper plugs have a large copper core for excellent conductivity, but their electrodes wear faster, requiring more frequent replacement. They are generally not recommended for modern engines designed for iridium or platinum plugs.

How to gap a spark plug

While most modern iridium spark plugs come pre-gapped from the factory, it's always a good idea to check the gap before installation. An incorrect gap can affect spark intensity and combustion efficiency. For your 2020 Toyota RAV4, the recommended gap is 0.043 inches (1.1 mm).

To gap a spark plug:

1. Use the correct tool: A wire-type feeler gauge is recommended. Avoid using ramp-style gapping tools, as they can damage the delicate iridium tip.
2. Check the gap: Slide the correct size wire gauge between the center and ground electrodes. There should be a slight drag.
3. Adjust if necessary: If the gap is too small, use the gapping tool to gently bend the ground electrode outwards. If the gap is too large, tap the ground electrode gently on a non-marring surface to close the gap slightly. Be very careful not to apply leverage or force on the center iridium electrode itself.

Replacement procedure tips

Replacing spark plugs on your 2020 Toyota RAV4 with the 2.5L A25A-FKS engine is a relatively straightforward process for experienced DIYers. Here are some key tips:

• Coil-on-plug removal: Your RAV4 uses a coil-on-plug ignition system. This means each spark plug has its own individual ignition coil directly mounted on top of it. To access the spark plugs, you'll need to carefully disconnect the electrical connector from each coil and then unbolt and remove the coil. Be gentle with the connectors, as they can become brittle over time.
• Anti-seize debate: There's ongoing debate among technicians about the use of anti-seize compound on spark plug threads. Toyota generally does not recommend it for spark plugs. Modern spark plugs often come with a special coating on the threads to prevent seizing. Applying anti-seize can alter the torque readings, leading to over-tightening and potential damage to the cylinder head threads.
• Dielectric grease on boots: Apply a small amount of dielectric grease inside the spark plug boot (the part that connects to the top of the spark plug). This helps to seal out moisture, prevent corrosion, and makes future removal easier. Dielectric grease is an electrical insulator and helps prevent voltage leaks.
• Torque specs are critical: Always use a torque wrench to tighten the new spark plugs to the specified torque setting: 13 lb-ft (18 Nm). Over-tightening can damage the spark plug and/or the cylinder head threads, while under-tightening can lead to combustion gas leaks and misfires.
• One at a time: It's often best to replace one spark plug at a time. This helps prevent mixing up spark plug wires/coils and keeps debris from falling into open spark plug wells.

Known issues

The 2020 Toyota RAV4 with the 2.5L A25A-FKS engine does not have any widespread or notorious spark plug related issues as seen in some other vehicles (e.g., Ford 3-valve engine's propensity for two-piece spark plug breakage). The engine design is robust, and following the recommended maintenance schedule with the correct OEM or equivalent spark plugs should ensure reliable performance.

Need plugs replaced? Find a shop on Repairius.