How to Distinguish the Material of Spark Plugs?

[EverettDella]

Distinguishing the material of spark plugs is done by observing the central core of the electrode. The specific methods are: 1. A thicker core indicates a standard type; 2. A thinner, white-colored core indicates platinum; 3. A thinner, yellow-colored core indicates iridium. The spark plug is a crucial component of a gasoline engine's ignition system. It introduces high voltage into the combustion chamber, causing a spark to jump across the electrode gap, which ignites the combustible air-fuel mixture in the cylinder. Its components include: terminal nut, insulator, terminal stud, center electrode, side electrode, and shell. Common causes of spark plug failure include: 1. Severe carbon deposits or oil contamination; 2. Mismatched model; 3. Prolonged engine idling; 4. Cracked insulator skirt; 5. Excessive gap; 6. Low insulation resistance; 7. Short circuit in high-voltage wires.