How Often Should Engine Spark Plugs Be Replaced?

[DelAnthony]

Ordinary nickel alloy spark plugs should be replaced approximately every 20,000 kilometers, platinum spark plugs around every 40,000 kilometers, and iridium spark plugs every 60,000 to 80,000 kilometers. Below is relevant information: 1. Spark plugs are a crucial component of the ignition system in gasoline engines. They introduce high voltage into the combustion chamber, causing a spark to jump across the electrode gap, thereby igniting the combustible air-fuel mixture in the cylinder. 2. A spark plug mainly consists of a terminal nut, insulator, terminal stud, center electrode, side electrode, and shell, with the side electrode welded to the shell. Spark plugs are mounted on the side or top of the engine. In earlier designs, spark plugs were connected to the distributor via ignition cables, but over the past decade, most car engines have switched to direct connection between the ignition coil and the spark plug.