Can a Spark Plug with a Cracked Ceramic Still Be Used?

[DeAlexis]

Spark plugs with cracked ceramics cannot be reused. Below is an introduction to spark plugs: 1. The function of a spark plug is to introduce the high voltage generated by the ignition coil into the engine cylinder, creating a spark at the electrode gap to ignite the air-fuel mixture. 2. Although small in size, the spark plug has a complex structure, consisting mainly of two parts: the insulator and the metal shell. The metal shell is threaded for screwing into the cylinder, and inside the shell is the insulator, through which a central electrode runs. The top of the central electrode has a terminal nut to connect to the high-voltage wire from the distributor. The lower end of the shell is welded with a ground electrode, and there is a gap of 0.6 to 1 millimeter between the central electrode and the ground electrode. When high voltage passes through this gap to ground, it generates a spark to ignite the air-fuel mixture.