How to Replace Car Spark Plugs?

[VanVincent]

Steps for replacing spark plugs: Open the hood, lift the plastic engine cover, remove the high-voltage ignition wires, and mark each cylinder's position to avoid confusion. Use a spark plug socket to remove the spark plugs one by one. While removing, check for external debris like leaves or dust and ensure thorough cleaning. Place the new spark plug into the spark plug hole, hand-tighten it a few turns, then use the socket to tighten further. Reinstall the high-voltage ignition wires in the firing order and secure the cover. Spark plug replacement interval: Under normal maintenance conditions, replace every 40,000–60,000 km, but this may vary by brand and engine type. Always follow the owner's manual. Reference these general guidelines: Platinum spark plugs: replace at 40,000 km. Standard nickel-alloy spark plugs: replace at 20,000 km. Iridium spark plugs: replace at 60,000–80,000 km.