The requirements for the spark plug are strict: soot and soot on the insulator and electrodes – an immediate replacement is required for a spark plug with a lower glow number.
The spark plug is far from the most noticeable part of the car, but its importance cannot be overestimated. The most important thing, perhaps, is not to make a mistake with the choice: even new spark plugs are not the same in their capabilities.
If, for example, a trace of solder of the central electrode can be seen on the spark plug (the end of the base of the insulator is bubbly), the complete absence of a spark and damage to the engine cannot be ruled out. The reason is simple: thermal overload due to electrical detonation, faulty valves, or a spark plug with the wrong glow rating.
To unscrew the candle, you must wait until the engine cools down. In any case, the thermal characteristic of the spark plug must match the engine. For the appearance of an effective spark, the lower part of the insulator of the candle is heated from five hundred to six hundred degrees Celsius. In this case, oil droplets, falling on the insulator and electrodes, burn out without a trace. If the temperature is below normal, oil droplets, burning, leave carbon deposits on the insulator, electrodes and body, the candle sparks badly, or even stops working altogether.
Exceeding the temperature of the lower part of the candle insulator threatens with even more unpleasant consequences. The fact is that the mixture in this case burns out from hot electrodes, and not from a spark. Out of sync. Fuel burns out earlier than it should. The engine knocks and cannot pick up the speed necessary for the development of speed. In the future – a complete stop of the engine. In this regard, the requirements for the spark plug are strict: soot and soot on the insulator and electrodes – an immediate replacement is required for a spark plug with a lower glow number.
As for working spark plugs, one must take into account an important truth in relation to them: they can work without problems until the moment when the problem appears like snow on the head. This can happen far from the repair shop and your garage. If spark plugs serve you faithfully for a long time, inspect them at home, replace if necessary. This is the number one requirement for an inconspicuous but important part of the car.