Identify the spark plug common fault

When the owner of the spark plug found that the top of the scar or damage, the emergence of the electrode ablation, ablation scene, all that the spark plug has been damaged, this time should change the spark plug. During the change process, the owner can inspect the spark plug ablation symptoms and color changes.
Symptom 1: The electrode is ablated and the insulator is white. Diagnosis: This phenomenon indicates that the temperature in the combustion chamber is too high. This may be due to too much coke in the combustion chamber, resulting in too small a valve clearance, further causing overheating of the exhaust valve or poor operation of the cooling device. Electrode ablation can also occur when the spark plug is not tightened to the specified torque, and the insulator appears white.
Symptom 2: The electrode is round and the scarring of the insulator is diagnosed: This indicates that the engine is pre-ignited. This may be caused by too early ignition or low octane values of the gasoline and excessive heat value of the spark plug.
Symptom 3: Disruption of insulator tips Diagnosis: Detonation combustion is usually the main cause of insulator rupture. The ignition timing is too early, the octane number of gasoline is low, and the temperature in the combustion chamber is too high, which may cause the engine to knock and burn.
Symptom 4: There is gray-black streaks at the top of the insulator Diagnosis: The presence of this streaking indicates that the spark plug has leaked and the owner needs to change the new item unconditionally.
Spark Plugs have deposits on the top of the spark plug insulators and sometimes deposits between the electrodes. Owners should not underestimate this deposit.
In severe cases, this condition may cause the engine not to work properly. After a clean spark plug, the vehicle is temporarily able to get normal operation, but similar situations will soon emerge. In fact, the appearance of spark plug deposits is only an external representation. This may be a signal of the emergence of other mechanical components in the vehicle.
Symptom 1: Oily deposits on spark plugs Diagnosis: When oily deposits appear on spark plugs, it indicates that smooth oil has entered the combustion chamber. If only a few spark plugs have oily deposits, damage to valve stem seals may be caused. However, if the spark plug of each Cylinder sticks to this kind of deposit, it indicates that the cylinder has appeared oil. Generally speaking, in the case of clogged Air Filters and ventilators, the cylinders are very vulnerable to the appearance of oil.
Symptom 2: The black plug on the spark plug Diagnosis: There is a black deposit inside the spark plug electrode and inside, which usually indicates that the gas in the cylinder is too thick. The owner can increase the speed of the engine and continue for a few minutes to burn off a layer of black soot that remains on the electrodes.