How to choose a spark plug-the thread diameter and thread length should be the same

Second, choose the same diameter of the spark plug thread

The size of spark plugs requires special attention to the thread. Generally speaking, there are three main types of spark plugs on the market in diameter: 10mm, 12mm and 14mm. Among the many models sold in the world, 14mm is the most mainstream size. However, as the engine design becomes more and more As it becomes more compact, various parts will also be miniaturized. Spark plugs are no exception. The trend of becoming smaller and thinner has been set. In the future, spark plugs with smaller diameters such as 10mm and 12mm will become the mainstream in the future.

Three, the length of the spark plug thread should be the same

One important dimension of spark plugs is the length of the thread, but it is too difficult for ordinary users to remember these models, and it does not make much sense. You only need to remember what size spark plugs your car requires to replace.