Under normal circumstances, the spark plug service life of 15000 km, long life of the spark plug is not more than 30000 km. However, many owners of the spark plug often appear this kind of problem, can not reach its normal service life.
In fact, the working temperature of the spark plug in the north of Baotou is very high. When the engine is running, the temperature of the insulator skirt of the spark plug is generally between 500 and 600 degrees celsius. The temperature is too high or too low on the spark plug is not good. In the case of the spark plug temperature is too low, the insulator on the spark plug is easy to carbon deposit, and finally cause the leakage of electricity to produce the phenomenon of lack of fire. If the spark plug operating temperature is too high, easy to cause early combustion and engine knock. In the Chery motor training camp, the staff of the store will spark plug common faults are summed up in two. The first one is the spark plug, and the other is the spark plug.
Spark plug ablation when the owner found that the spark plug at the top of the scar or damage, the electrode melting, ablation phenomenon, that the spark plug has been destroyed, this time should be replaced spark plug. In the replacement process, the owner can check the spark plug ablation of the disease as well as changes in color.
Symptom 1: electrode melting and insulator white
Diagnosis: this phenomenon indicates that the combustion chamber temperature is too high. This may be too much carbon deposition in the combustion chamber, resulting in the valve clearance is too small, and further lead to overheating of the exhaust valve or cooling device is caused by poor work. When the spark plug is not tightened according to the prescribed torque, the electrode will melt and the insulator will be white.
Symptom 2: the electrode becomes round and has a scar
Diagnosis: This indicates that the engine is premature, may be the ignition time is too early or the gasoline octane number is too low, spark plug high calorific value caused by the.
Symptoms 3: the top of the insulator fragmentation
Diagnosis: Generally speaking, knock combustion is the main cause of insulator rupture. The ignition time is too early, the gasoline octane number is low, the combustion chamber temperature is too high, which can lead to engine knock combustion.
Symptoms 4: top black stripes
Diagnosis: the appearance of this stripe indicates that the spark plug has been leaking, the owner needs to replace the new piece unconditionally.
Spark plug with sediment
Baotou North Benz parts of the spark plug insulator between the top and the electrode sometimes stuck on the sediment. Owners do not underestimate this sediment.
This may cause the engine to fail to work properly. After cleaning the spark plug, the vehicle can run normally for the time being, but it will happen soon. In fact, the formation of the spark plug is only a surface phenomenon, which may be a problem with other parts of the vehicle mechanical signal.
Symptoms 1: spark plug with oily deposits
Diagnosis: when the north of Baotou Benz parts spark plug oil deposits appear, it means that the oil has entered the combustion chamber. If there is only an individual spark plug with oily deposits, it may be caused by damage to the valve rod oil seal. However, if the spark plug of each cylinder is stuck with this kind of sediment, it indicates that there is a jump in the cylinder. In general, in the case of air filters and ventilation devices blocked, the cylinder is prone to jump oil phenomenon.
Symptom 2: black deposits on spark plug
Diagnosis: spark plug electrodes and internal black deposits usually indicate a mixture of gases in the cylinder. The owner can increase the speed of the engine, and continue for several minutes, so as to burn a layer of black soot left on the electrode.