Is it necessary to replace spark plugs after driving 60,000 kilometers?

[HeidiDella]

Spark plugs that have run for 60,000 kilometers do indeed need replacement. Under normal maintenance conditions, they should be replaced after driving 40,000 to 60,000 kilometers. However, this may vary depending on the brand and engine type, so it is recommended to follow the user manual. You can refer to the following maintenance standards for 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: First, open the hood and remove the engine's plastic cover. Detach the high-voltage distributor wires, marking each cylinder's position to avoid confusion. Then, 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 they are thoroughly cleaned. Next, place the new spark plug into the spark plug hole, hand-tighten it a few turns, and then use the socket to tighten it further. Finally, reinstall the high-voltage distributor wires in the firing order and secure the cover. How spark plugs work: Under high voltage, the air between the spark plug's center electrode and side electrode rapidly ionizes, forming positively charged ions and negatively charged free electrons. When the voltage between the electrodes reaches a certain level, the number of ions and electrons in the gas increases like an avalanche, causing the air to lose its insulating properties and forming a discharge channel, resulting in a "breakdown." At this point, the gas becomes a luminous body, creating a "spark." Along with the heat expansion, a "snapping" sound is also produced. The temperature of this electric spark can reach 2,000 to 3,000°C, which is sufficient to ignite the air-fuel mixture in the combustion chamber.