Spark plugs are one of the most troublesome components in the engine ignition system. If there are negligence or negligence in many aspects such as the use and maintenance of the spark plug, it will affect its normal function. Today, Xiaobian will share with you the six maintenance taboos of the spark plug. Let’s take a look!
Six maintenance taboos for spark plugs
1, avoid long-term unclean carbon deposits
When the spark plug is in use, its electrode and skirt insulator will have normal carbon deposit. If these carbon deposits are not cleaned for a long time, they will accumulate more and more, and eventually the electrode will leak or even fail to jump. Therefore, the carbon deposit should be removed regularly, and the cleaning should not be performed until the spark plug is not working.
2, avoid long-term use
There are many types of spark plugs, but they all have their own economic life. If they are used after the economic life, they will not be good for the engine’s power performance and economy. Studies have shown that with the extension of the life of the spark plug, the end face of the center electrode will change toward the shape of the arc, and the side electrode will change to the shape of the concave arc. This shape will increase the gap of the electrode and cause discharge difficulties, affecting the engine. normal work.
3, avoid random descaling
Some people do not pay attention to the cleanliness of the spark plug when it is sprayed with silver powder or other maintenance during the winter, causing the spark plug to leak due to dirt on the outside. When cleaning the appearance, it is not convenient and quick to use the sandpaper, metal sheet and other descaling. The spark plug should be immersed in the gasoline and removed with a brush to ensure that the ceramic body of the spark plug does not receive damage.
4, avoid burning
In reality, some people often use fire to remove carbon deposits and oil from the spark plug electrodes and skirts. This seemingly effective method is very harmful in real time. Because of the fire, the temperature is difficult to control. It is easy to burn the skirt insulator, causing the spark plug to leak, and the small cracks generated after the fire are often difficult to find, which causes great troubles for troubleshooting. The correct treatment method for carbon and oil on the spark plug is to clean it with special equipment, which will have good effect. Second, the solution is clean, soak the spark plug in ethanol or gasoline for a certain period of time, and then use the hair when the carbon is softened. Brush and dry.
5, avoid hot and cold
In addition to different shapes and different sizes, spark plugs are also divided into cold and hot. Generally, a cold-type spark plug should be used for a high compression ratio and high speed engine, and a hot spark plug should be used for a low compression ratio and low speed engine. In addition, the selection of spark plugs for new or overhaul engines and old engines may vary depending on the actual situation. For example, when the engine is newer, the spark plug should be hot type; the old engine that has been used for a long time will have too much performance due to the performance degradation, and the spark plug should be medium or cold to improve the spark plug. Oil resistance.
6, avoid misdiagnosis and mistake
When replacing a new spark plug or suspecting that it is faulty, it should be checked after the vehicle has been in normal operation for a period of time. Stop the spark plug and remove the spark plug to carry out the electrode color characteristics. There are several cases:
A, the center electrode is reddish brown, the side electrode and the surrounding area are blue-gray, suitable for the selection of spark plugs;
B. There is ablation or burning between the electrodes, and the skirt and the insulator are white, indicating that the spark plug is overheated;
C, black stripes between the electrodes and the skirt of the insulator, indicating that the spark plug has leaked. If the spark plug is not properly selected or leaks, the appropriate spark plug should be re-selected.
How many kilometers is the spark plug?
In fact, in the car’s maintenance manual, including the instructions, there is a suggestion for how many kilometers to change, but this proposal is limited to the spark plugs that are shipped from the car. Later, these spark plugs are replaced because of the different materials and power consumption. Different, nickel spark plugs may reach 30,000 to 40,000 kilometers, spark plugs in platinum to 50,000 to 60,000 kilometers, and there are gaps between different brands. For example, some international big-name, such as the doctor’s spark plug has been done for many years, if you do not want to trouble, you can change the platinum, so that life is longer.
When should the spark plug be replaced?
In fact, we can see it through visual judgment. After unscrewing the engine screw and taking out the spark plug, you can see that if the electrode has no ablation, it is relatively intact, but the color is somewhat carbon deposit and attachment. As long as the attachment is cleaned up, it can still be used. If the spark plug is burned, the motor is damaged, or even severely damaged, it must be changed. Of course, you can also find a car repairer to bring the spark plug to you to look at it. This is also a more reliable approach.
Post time: Apr-16-2020