In the maintenance car, spark plugs should be more concerned about the situation, good performance spark plugs can improve vehicle dynamic performance.

    Typically, the service life of spark plugs is 15,000 km, long-lasting spark plug life is not more than 30,000 km. However, many owners of the spark plug all kinds of problems often arise not reach its normal service life.

    In fact, the spark plug operating temperature is very high. Normal operation of the engine when the temperature of the spark plug insulator skirt is generally maintained at 500 to 600 degrees Celsius. Temperature is too high or too low impact on the spark plug is not good. Temperature is too low in the case of spark plugs, spark plug insulator is easy on the coke, and ultimately lead to leakage that produces the phenomenon of lack of fire. If the spark plug operating temperature is too high as to cause early ignition and engine knock. Chery Automobile in training camp, the store staff will spark plugs appear summed up in two common faults. For the spark plug of a serious erosion, and the other for the spark plug with sediments.

    Spark ablation

    When the owners found a scar on top of or damage to the spark plug, the electrode appears melting, ablation phenomenon, have shown that the spark plug has been damaged, then you should replace the spark plugs. During the replacement process owners can check the spark plugs as well as ablation of the symptoms of a color change.

    Symptom 1: Electrode melting and white insulator

    Diagnosis: This phenomenon shows that the combustion chamber temperature is too high. This may be too much coke combustion chamber, resulting in valve clearance is too small, and further lead to overheating or cooling exhaust valve caused by poor work. In the spark plug according to the specified tightening torque when the electrodes can also cause melting, the phenomenon of insulator is white.

    Symptom 2: rounded electrodes and a scar on insulator Results

    Diagnosis: This indicates that early engine fuel, ignition timing may be premature or low octane gasoline, spark plug heat value caused by other reasons too.

    Symptom 3: insulator top of the fragmentation

    Diagnosis: Generally speaking, the detonation combustion is the main reason for broken insulators. The premature ignition timing, low octane gasoline, the combustion chamber temperature is too high, may lead to engine knocking.

    Symptom 4: there are gray and black striped top insulator

    Diagnosis: The appearance of stripes that have been leaking spark plug, owners need to unconditionally replaced with new parts.

    Deposits on the spark plug

    The top of spark plug insulator and electrode is sometimes tainted sediments. Do not underestimate this sediment owners.

    This may result in severe engine does not work. After cleaning the spark plug, the normal operation of the vehicle can be temporarily, but soon after there will be a similar situation. In fact, the spark plug there is only a superficial sediment, which may be problems with vehicles other mechanical components of signal.

    Symptom 1: oily deposits on the spark plug

    Diagnosis: When the spark plug on the oil deposits there, it shows that oil has entered the combustion chamber. If only the individual spark plugs have oil deposits, it may be caused by damage to the valve stem oil seals. But if the spark plug of each cylinder such deposits are sticky, then the jump appeared cylinder oil. In general, blocked air filter and ventilation for the case of the oil cylinder prone to the phenomenon of jump.