Under normal circumstances, the spark plug for the life of 15,000 km, the long-term life of spark plugs or more than 30,000 kilometers. However, many owners of the spark plugs, often kinds of problems, not their normal life.

In fact, spark plugs, the temperature is very high. Normal operation of the engine, the spark plug insulators skirt generally maintained at the temperature of 500 to 600 degrees Celsius between. Too high or too low temperature impact on the spark plugs are not good. In the low temperature of the spark plug, spark plug on the insulator easy coke, and ultimately caused a leakage even lack fire phenomenon. If the spark plug temperature too high, making it easy for long burning and detonation engine. Chery Automobile in training camp, the staff will store the spark plug Common Faults summed up in two. A serious erosion of spark plugs, spark plug for another kind of a sediment.

Spark Plug ablation

When the owners discovered a scar on the top of spark plugs or destroyed, there electrode melting, erosion phenomenon, has already indicated that the destruction of spark plugs, spark plug should be replaced at this time. In the process of replacing the owner can check the erosion of spark plugs and the like color changes.

Symptoms 1: melting electrode and insulator is white

Diagnosis: This phenomenon shows that high temperature combustion chamber. This may be too much coke combustion chamber, resulting in valve gap too small, overheated exhaust valve caused further cooling device or the working poor. In the spark plug according to the specified torque tightening will also caused electrode melting, white insulator show phenomenon.

2 symptoms: change electrode and insulator guitar with a round scar

Diagnosis: This indicates that as early as the engine combustion, ignition time is premature or low octane number of gasoline, spark plugs, high calorific value of the reasons.

Symptoms 3: insulator cracked the top

Diagnosis: Generally speaking, broken insulator knock combustion is the main reason. And the premature ignition time, petrol with an octane number of low combustion chamber temperature is too high, may lead to engine knock combustion.

4 symptoms: a grey top insulator black stripes

Diagnosis: the emergence of such a block has been that spark plug leakage, the owner needs unconditional replacement parts.

Spark plugs on the sediments

Spark plug electrodes insulator between the top and sometimes viscosity sediments. Do not underestimate the owners of such sediments.

Serious this situation may cause the engine can not work normally. In the clean spark plugs, and vehicles can be temporarily normal operation, but will be soon after in similar circumstances. In fact, spark plugs, sediment there is only a superficial, but this may be other mechanical components, vehicle problems signal.

Symptoms 1: Spark Plug on oily sediment

Diagnosis: When a spark plug on the oily sediment, it is that oil has entered the combustion chamber. If there is only an individual spark plugs, oil sediments, it may damage the valve rod seal caused. But if the cylinder is all the spark plugs are Nien such sediments, showed that the cylinder oil leapt up there. Generally speaking, the air filter and ventilation devices plug circumstances, a cylinder easily leapt up oil phenomenon.

Symptoms 2: Spark plug on the black sediment

Diagnosis: Spark plug electrodes and internal black sediments, usually in the mixed gas cylinder that Guonong. Owners can increase engine speed operation, and continued a few minutes to burn to stay in the top electrode layer of black soot.