How to Identify the Model and Specifications of Torch Spark Plugs?
2 Answers
The model number is located on the spark plug shell, representing material, size, heat value, resistance, and gap. Spark plugs are critical components in a gasoline engine's ignition system. They introduce high voltage into the combustion chamber, causing a spark to jump across the electrode gap, thereby igniting the combustible air-fuel mixture in the cylinder. 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 across 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. This creates a discharge channel across the gap, resulting in a "breakdown" phenomenon. At this point, the gas forms a luminous body known as a "spark." Along with thermal expansion, a "crackling" sound is produced. The temperature of this electric spark can reach 2000–3000°C, sufficient to ignite the air-fuel mixture in the cylinder's combustion chamber.
To check the model specifications of Xianghuoju spark plugs, I usually follow these steps during car maintenance. First, locate the spark plug itself, which is typically installed on the engine cylinder head. Use a spark plug wrench to gently remove one, and you'll find engraved text and numbers on the metal casing, such as common heat range codes like K6RTC or L8RTI. The heat range indicates the spark plug's heat dissipation capability, with larger numbers representing faster heat dissipation, suitable for high-speed engines. If you haven't removed it, simply check the label printed on the side or bottom of the packaging box. Remember to note down all the numbers, as each part corresponds to different parameters, such as electrode gap and thread size. Xianghuoju is a well-established domestic brand widely used in Chinese-made vehicles. Regularly replacing spark plugs can improve fuel efficiency and power, preventing ignition issues. I always take a photo of the old part with my phone before heading to the auto parts store to match the model, ensuring I get the correct one without delaying my trip.
