![]() One can find comprehensive spark plug specifications, such as type, heat range, and spark plug gap, in the owner’s manual. It's in this gap that a high-voltage spark is generated, setting the air-fuel mixture aflame and driving the combustion chamber's function. ![]() A copper core ground electrode arches over this tip, providing the essential spark plug gap. The center electrode culminates in a precious metal, often gold or palladium, shaped like a nipple. The spark plug is also equipped with a steel jacket, enabling the threaded end to fit snugly into the cylinder head. ![]() This tip extends down as the center electrode, encapsulated by an insulated core made of a ceramic housing, predominantly porcelain. A spark plug's construction consists of an upper contact tip that gets its voltage from the ignition system, facilitated by spark plug wires. ![]()
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