How often should the Civic's spark plugs be replaced?
2 Answers
Civic spark plug replacement intervals are primarily determined by mileage. The spark plugs should be replaced every 40,000 to 60,000 kilometers. Spark plugs are a crucial component of a gasoline engine's ignition system. They introduce high voltage into the combustion chamber and create a spark by jumping the electrode gap, thereby igniting the combustible air-fuel mixture in the cylinder. Steps for replacing spark plugs: Open the hood, lift the engine's plastic cover, and remove the high-voltage distributor wires. Mark each cylinder's position to avoid confusion. Use a spark plug socket to remove the spark plugs one by one. While removing them, check for any external debris like leaves or dust and ensure everything is cleaned thoroughly. Place the new spark plugs into the spark plug holes, hand-tighten them a few turns, and then use the socket to tighten them further. Reinstall the high-voltage distributor wires according to the firing order and secure the cover.
I drove a Civic for over five years. Generally, spark plugs are recommended to be replaced every 60,000 to 100,000 kilometers, or inspected every 4 to 6 years. I personally had mine replaced at an authorized dealership at 80,000 kilometers, costing around 500 yuan, which felt quite cost-effective. Worn-out spark plugs can easily cause difficulty starting the car or increased fuel consumption, especially noticeable in stop-and-go city driving. If you delay replacement for too long, the engine's power may decrease, and fuel consumption could surge by 10% or more. It's important to pay attention and follow the maintenance schedule in the manual—keeping your Civic running smoothly gives peace of mind. I also tried DIY replacement once, but you need a special socket tool. It's not recommended for beginners, as improperly handling it could lead to the spark plug falling into the cylinder, which is troublesome. After replacement, the car runs much quieter, and acceleration feels smoother.
