Where to Find the Spark Plug Model Number?

[Kyle]

Generally, the ceramic part of a spark plug is marked with the model number. What is a Spark Plug: A spark plug is a crucial component of the ignition system in a gasoline engine. It introduces high voltage electricity into the combustion chamber and generates a spark by jumping across the electrode gap, thereby igniting the combustible air-fuel mixture in the cylinder. Components of a Spark Plug: A spark plug mainly consists of a terminal nut, insulator, terminal stud, center electrode, side electrode, and metal shell. Types of Spark Plugs: Main types of spark plugs include: standard spark plugs, projected insulator spark plugs, electrode spark plugs, seat-type spark plugs, surface-gap spark plugs, and surface-discharge spark plugs. Location of Spark Plugs: Spark plugs are installed on the side or top of the engine. In early designs, spark plugs were connected to the distributor via ignition cables. Over the past decade, most car engines have adopted direct connection between ignition coils and spark plugs.