Where is the spark plug located in a vehicle?
1 Answers
Spark plugs are installed on the side or top of the engine. In earlier models, spark plugs were connected to the distributor via ignition cables, but over the past decade, most car engines have transitioned to direct connection between ignition coils and spark plugs. Working principle of spark plugs: The ground electrode of a spark plug is connected to the metal shell, which is then threaded into the engine block via the cylinder head. The insulator primarily serves to isolate the metal shell from the central electrode. The terminal nut is the part of the spark plug that contacts the high-voltage coil. When current passes through the terminal nut and central electrode, it ionizes the medium between the central electrode and ground electrode to generate a spark, thereby igniting the air-fuel mixture in the cylinder. Spark plug replacement interval: Under normal maintenance conditions, replacement is recommended every 40,000 to 60,000 kilometers. However, this may vary depending on the brand and engine type, so always refer to the owner's manual. The following standards can serve as a reference for maintenance replacement: Platinum spark plugs should be replaced at 40,000 km, standard nickel alloy spark plugs at 20,000 km, and iridium spark plugs between 60,000-80,000 km.
