Technical information

Spark Plug Anatomy / Construction

Resistor Spark Plugs

Precious Metal Spark Plugs

Spark Plug Installation

LPG Compatibility

Operating Temperature

Heat Range Explanation


Electrode Gap

Electrode Gap Adjustment

Modified / Performance Engines

Spark Plug Analysis

Technical information

Operating Temperature

The operating temperature of a spark plug varies between 450-870°C. At 450°C the spark plug reaches its self cleaning temperature; this means that carbon deposits which are produced during combustion are actively burnt off the insulator nose. When too many carbon deposits accumulate along the insulator nose carbon fouling occurs and engine misfire may occur. If the temperature of a spark plug exceeds 870°C overheating may occur leading to spark plug and possible engine damage.