Regular maintenance is key to keeping your Mitsubishi Eclipse Cross running smoothly, and replacing spark plugs is an essential part of that routine. Spark plugs ignite the air-fuel mixture in the engine, so worn or faulty plugs can cause misfires, reduced fuel efficiency, and poor engine performance.

Tools Needed for Replacing Spark Plugs

  • Spark plug socket (usually 5/8" or 13/16")
  • Ratchet wrench with extension
  • Torque wrench
  • Gap gauge or feeler tool
  • Dielectric grease
  • Anti-seize compound (optional)
  • Compressed air or a small brush for cleaning

Step-by-Step Technique

Before starting, ensure the engine is cool to prevent damage. Follow these steps to replace your spark plugs:

  1. Remove the engine cover if necessary to access the spark plugs.
  2. Use compressed air or a brush to clean the area around each spark plug to avoid debris falling into the cylinder.
  3. Disconnect the ignition coil or spark plug wire carefully.
  4. Use the spark plug socket and ratchet to unscrew and remove the old spark plug.
  5. Check the gap on the new spark plug using a gap gauge and adjust it according to the manufacturer’s specifications.
  6. Apply a small amount of dielectric grease on the inside of the spark plug boot to ensure a good connection.
  7. Install the new spark plug by hand to avoid cross-threading, then tighten it with a torque wrench to the recommended torque setting.
  8. Reconnect the ignition coil or spark plug wire.
  9. Repeat for each spark plug and reinstall the engine cover.

Following these steps helps maintain optimal engine performance and fuel economy for your Mitsubishi Eclipse Cross. If you're unsure or uncomfortable performing this maintenance yourself, consult a certified Mitsubishi technician.