When Should Spark Plugs Be Replaced in a Car?

[KevinLynn]

A car's spark plugs should be replaced under the following circumstances: difficulty starting, reduced power, excessive exhaust emissions, or increased fuel consumption. Under normal maintenance conditions, spark plugs should be replaced every 40,000 to 60,000 kilometers, but this may vary depending on the brand and engine type. It is recommended to follow the vehicle's manual. The following standards can be used as a reference for maintenance replacement: platinum spark plugs should be replaced at 40,000 kilometers, standard nickel alloy spark plugs at 20,000 kilometers, and iridium spark plugs at 60,000 to 80,000 kilometers. Steps for replacing spark plugs: Open the hood, lift the engine's plastic cover, and remove the high-voltage ignition wires, marking each cylinder's position to avoid confusion. Use a spark plug socket to remove the spark plugs one by one, ensuring that any external debris such as leaves or dust is cleaned off before proceeding. Place the new spark plug into the spark plug hole, hand-tighten it a few turns, and then use the socket to fully tighten it. Reinstall the high-voltage ignition wires in the correct firing order and secure the cover back in place.