What is the heat range of NGK Spark Plugs?

What is the heat range of NGK Spark Plugs?

2-11
Typically the heat range for NGK Spark Plugs varies from 2-11. This number indicates the thermal characteristics of a spark plug, or how ‘hot’ or ‘cold’ a spark plug is. The term hot/cold is commonly used to describe whether a spark plug heats up easily (hot) or whether it provides resistance to heating up (cold).

Why are my spark plugs overheating?

Overheating. Repeated overheating of the spark plug tip can cause the plug to prematurely fail. Overheating can be caused by many things like pre-ignition and a malfunctioning cooling system. Pre-ignition can lead to heat building up in the combustion chamber causing the spark plugs to fail.

How can you tell which spark plug is hotter?

The heat range of a spark plug is the range in which the plug works well thermally. The heat rating of each NGK spark plug is indicated by a number; lower numbers indicate a hotter type, higher numbers indicate a colder type.

How do I know my NGK heat range?

NGK indicates the heat range in the middle of the plug number. For example, BCPR6ES-11 has a heat range of 6. (The number after the “-“ is the gap.) Starting with part # BKR6E-11 (heat range 6), a colder plug would # BKR7E-11 (heat range 7), a hotter plug would be # BKR5E-11 (heat range 5).

Do colder spark plugs make a difference?

For NGK, Denso and Pulstar, the higher the number, the colder the plug. When making spark plug heat range changes, it is better to err on the side of too cold a plug. Running too cold a plug can only cause it to foul out, whereas running too hot a plug can cause severe engine damage.

Is a 7 or 8 spark plug hotter?

(The 6 at the end of this part indicates the gap setting.) Champion plugs are hotter the higher the number, colder the lower the number. Starting with part # RCJ7Y (heat range 7), a colder plug would be # RCJ6Y (heat range 6), a hotter plug would be # RCJ8Y (heat range 8).

Do hotter spark plugs make a difference?

A hotter plug does what is says, it runs hotter. This will not give any more power and neither will a too cold plug. Because the spark plug resides in the combustion chamber, it’s influenced by what happens there. If the current plug is too hot then the tip may be melted or deformed.