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Diagnosis of engine appearance of spark plugs
Brown or grayish-yellow color and a small electrode wear. Exact values candles for heat engine and operating conditions. HELPFUL ADVICE When replacing spark new place candles with the same characteristics of those recommended by the manufacturer. |
Dry deposition of soot indicates a rich fuel mixture or after the ignition. It causes misfiring, hard starting engine and an unstable operation of the engine. Check for clogged air filter are serviceable if the coolant temperature sensor and the supply air. HELPFUL ADVICE Use a "hot" candle. |
Oiled electrodes and insulator candles. The reason - the oil from entering the combustion chamber. The oil enters the combustion chamber through the valve guides or via the piston rings. Causes hard starting, gaps in the cylinder and jerking the engine running. Needed to repair the cylinder head and piston engine. Replace the spark plug. Deposits on the skirt insulator iron oxides brick-red color of the iron-containing anti-knock additive (ferrocenes) to gasoline. Postponed smooth, dense layer. When the motor with a heavy load under high temperature and pressure in the combustion chamber oxides are reduced in the current paths of pure iron, trailing the center electrode to the "masses." This causes a misfire and the resulting drop in engine power and increases fuel consumption. In addition, can be damaged by the catalytic converter exhaust gas, overheated when hit by unburned fuel in the engine cylinders. Plaque is practically not removed by mechanical means, and does not fade with prolonged driving at high speed. If this plaque appears on the new candles after a short run, a change of dressing. HELPFUL ADVICE If you can not immediately replace the spark new, try to remove the plaque, plunging ten minutes skirts candles insulators in phosphoric acid or a rust converter (containing phosphoric acid). After that, clean the coating of non-metallic brush (an old toothbrush is possible) and rinse with water first candle, then gasoline. |
Melted electrodes. Insulator white, but may be contaminated due to the spark gaps and falling on his deposits from the combustion chamber. It may damage the engine. It is necessary to check that the type of spark plug, clean spray nozzles and the fuel filter, the systems of cooling and lubrication. The insulator can be cracked or chipped. This can result in damage to the piston. Make sure that the octane number of gasoline as desired. Damage may be caused by foreign objects trapped in the combustion chamber, and in the case it is too long spark electrodes can catch piston. This leads to the destruction of the candle, and disconnect the cylinder can damage the piston. Remove the foreign object from the cylinder, and (or) replace the spark plug.
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