Buick gl6 original factory uses torch ld8rti spark plug, and the general replacement cycle of spark plug is 40,000 kilometers. The way to clean up the carbon deposit in the spark plug is to take out the spark plug, soak it in a container containing a certain amount of detergent for about 20 minutes, and then gently brush the spark plug head with a soft brush.
Spark plug is an important part of the ignition system of gasoline engine. It can introduce high-voltage electricity into the combustion chamber to make it jump over the electrode gap to generate sparks, thus igniting the combustible mixture in the cylinder. It mainly consists of a connecting nut, an insulator, a connecting screw, a center electrode, a side electrode and a shell, wherein the side electrode is welded on the shell.