Is the spark plug calorific value 7 replaced by the calorific value 6, is there a big difference between the spark plug calorific value 6 and 7?

Under normal circumstances, it is best not to replace the spark plug's calorific value. The change of the spark plug's calorific value will have a certain impact on the operation of the engine. But if you want to replace it, the principle is based on the original spark plug’s calorific value, and it is controlled within the next level. Therefore, it is feasible to change the calorific value of the spark plug from 7 to 6, but the premise is that it can be replaced according to the actual situation. , After replacement, there will be more or less different changes, so it is recommended that car owners do not change the heat value of the spark plug at will.

The calorific value of spark plugs includes nine levels, 1~3 are low calorific value, 4~6 are medium calorific value, and 7~9 are high calorific value. Therefore, the spark plug calorific value 6 belongs to the medium heat type, and the calorific value 7 belongs to the high heat type. There is a certain difference between the two. The better the balance of heat absorption and heat dissipation of the spark plug insulator skirt with a calorific value of 7, the higher the speed of the spark plug releasing heat from the combustion chamber, and the lower the working temperature of the spark plug.

Changing the original calorific value to a larger or smaller situation will have a certain impact on the engine. If the calorific value is reduced, the phenomenon of insufficient combustion of the oil and gas mixture may occur, and the situation of insufficient power may be felt, and the temperature of the spark plug may even be too high due to insufficient heat dissipation, which may further cause deflagration and other phenomena.

If the heat value of the spark plug is increased, the heat dissipation capacity will be stronger, the temperature of the spark plug will drop faster, and the ignition head will easily produce carbon deposits, which will cause electricity to run and the spark plug will not jump out of the fire.