The heat rating

The heat development varies greatly from engine to engine. For example, turbocharged engines run significantly hotter than engines which are not charged.

Therefore, there is a spark plug for each engine which can conduct a precisely defined measure of heat to the cylinder head and ensures that the optimal temperature window is maintained.

The so-called heat rating provides information about the thermal endurance of a spark plug.  The following applies for NGK spark plugs: The higher the heat rating, the higher the thermal endurance.

The heat rating number is found in the respective type designation of NGK spark plugs.

 

The so-called heat rating provides information about the thermal endurance of a spark plug.  In the process, the greater the engine load is, the higher the spark plug temperature.
The so-called heat rating provides information about the thermal endurance of a spark plug

Related topics

E-Learning: Would you like to learn more about the product technology? Then take advantage of the know-how of our experts on the NGK E-Learning platform, with 3D animations, videos and diagrams.

How you crack the NGK code: The combination of letters and numbers assigned for every NGK spark plug is not only the type designation, it is a logical formula which contains the important details for the function of the spark plug.

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