How to Know When to Replace Car Spark Plugs?

[MirandaDella]

If the spark plug gap becomes too wide, there's excessive carbon buildup, or oil traces are present, replacement is necessary. Conventional spark plugs are recommended for replacement every 30,000 kilometers, platinum spark plugs every 60,000 kilometers, and iridium spark plugs every 80,000 kilometers. Common spark plug faults fall into two categories: severe spark plug erosion and spark plug deposits. Spark plugs, commonly known as firing ends, are crucial components in gasoline engine ignition systems. They introduce high-voltage electricity into the combustion chamber, creating a spark across the electrode gap to ignite the air-fuel mixture in the cylinder. Main components include the terminal nut, insulator, terminal stud, center electrode, side electrode, and shell.