Taboos On The Use Of Car Spark Plugs

1. Avoid not cleaning the carbon deposits for a long time. When the spark plug is in use, the electrodes and skirt insulators will have normal carbon deposits. If these carbon deposits are not cleaned for a long time, they will accumulate more and more, eventually causing the electrodes to leak or even fail to spark. Therefore, carbon deposits should be removed regularly, and do not wait for the spark plug to stop working before cleaning. There are seven taboos when using automobile spark plugs. The Bluebird exhaust side spark plug does not spark.
2. Avoid long-term use. There are many types of spark plugs, but they all have their own economic life. If they are still used after the economic life is exceeded, it will be detrimental to the power and economy of the engine. Studies have shown that as the service life of a spark plug increases, the center electrode end surface will change to a circular arc shape, and the side electrodes will change to a concave arc shape. This shape will increase the electrode gap, cause discharge difficulties, and affect the performance of the engine. normal work.
3. Avoid descaling at will. Some people do not pay attention to cleaning the surface of the spark plug when spraying silver powder on the engine or performing other maintenance, causing the spark plug to leak due to dirty surface. When cleaning the surface, do not use sandpaper, metal sheets, etc. to remove scale easily and quickly. Instead, you should immerse the spark plug in gasoline and remove it with a brush to ensure that the ceramic body on the surface of the spark plug is not damaged.
4. Avoid burning. In reality, some people often use fire to remove carbon deposits and oil stains on the spark plug electrodes and skirts. This seemingly effective method is actually very harmful. Because when burning, the temperature is difficult to control. It is easy to burn the skirt insulator, causing spark plug leakage, and the small cracks produced after the fire are often difficult to find, which brings great trouble to troubleshooting. The correct way to deal with carbon deposits and oil stains on spark plugs is to use special equipment to clean them, which will have good results; second, to clean them with a solution, soak the spark plugs in alcohol or gasoline for a certain period of time, and then clean them with wool after the carbon deposits have softened. Brush clean and let dry.
5. Avoid distinguishing between hot and cold. In addition to different shapes and sizes, spark plugs are also divided into three types: cold type, medium type, and hot type. Generally, engines with high compression ratio and high speed should use cold spark plugs; engines with low compression ratio and low speed should use hot spark plugs, and there are medium-sized spark plugs in between. In addition, the spark plug selection for new or overhauled engines and old engines can be different depending on the actual situation. For example, when the engine is newer, the spark plug should tend to be a hot type; in an old engine that has been used for a long time due to performance degradation, the spark plug is prone to excessive carbon deposits and oil contamination. The spark plug should be medium or cold to improve the spark plug quality. Ability to resist oil stains.
6. Avoid misdiagnosis. When replacing a new spark plug or suspecting that it is faulty and needs to be inspected, you should stop the engine after the locomotive has been running normally for a period, remove the spark plug and observe the color characteristics of its electrodes. There may be the following situations: First, the center electrode is reddish brown, and the side electrodes and If the surrounding area is blue-gray, it indicates that the spark plug has been selected appropriately. Second, there is ablation or melting between the electrodes, and the skirt and insulator are burning white, indicating that the spark plug has been overheated. Third, there are black stripes between the electrodes and the skirt of the insulator. It means the spark plug has leaked. If the spark plug is improperly selected or leaks, a suitable spark plug should be selected.
7. Avoid installing too tightly. The spark plug must meet the specified torque when installed. When installing with special tools, it generally does not exceed the limit. However, if the force is too strong or too fierce, or when installing with a torx wrench, the spark plug porcelain core will often be damaged or the screw will slip, and the expansion groove will break, causing the spark plug to be scrapped; however, it cannot be installed. If it is too loose, the engine may not work properly.