Is It Necessary to Clean Carbon Deposits on Spark Plugs?
2 Answers
Spark plugs can be cleaned of carbon deposits. If the wear is minimal, they can continue to be used. Generally, under normal maintenance conditions, spark plugs 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. Platinum spark plugs should be replaced at 40,000 kilometers, ordinary 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 engine hood, lift the plastic cover of the engine, and remove the high-voltage 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 external debris such as leaves or dust and ensure everything is cleaned thoroughly. 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. Reinstall the high-voltage wires in the firing order, and then secure the cover.
I've been driving for ten years and often encounter spark plug carbon buildup issues. I think cleaning is somewhat necessary. Carbon buildup on spark plugs can lead to poor ignition, causing the car to idle roughly, lack power during acceleration, and increase fuel consumption. If the carbon buildup is minimal and the electrodes aren't worn, cleaning them by soaking in carbon remover and brushing can restore ignition performance, saving the few hundred dollars needed to replace new spark plugs. Previously, my car shook badly, but after cleaning, it ran normally for half a year with good results. However, if the carbon buildup is too severe or the electrodes are damaged, cleaning won't help and might even accelerate their failure. I recommend checking the color of the carbon buildup: soft black carbon can be cleaned, but don't bother with hard gray-white deposits. Cleaning is simple, but don't be careless—it's best to go to a familiar small shop. Additionally, carbon buildup is often caused by poor driving habits, such as frequent short trips, so correcting these can help reduce occurrences.
