If you claim to be a car kid, you should already be familiar with one of the tiny, but essential components: the spark plug. Car spark plugs have an effective lifespan and must be replaced regularly.
A bad spark plug will result in a less than perfect combustion process.
When replacing a new spark plug you cannot just open it, there is a correct way so as not to damage the spark plug and other components.
Replacing the new spark plug cannot be just opened, the first is not to open the old spark plug while the engine is still hot.
Opening the spark plug for a long time while the engine is still hot will increase the potential for the thread to become loose because the engine is expanding.
A loose spark plug thread can make the position of the spark plug in its housing loose.
The second thing to consider is a good spark plug wrench.
The use of a bad spark plug wrench makes the spark plug hexagon damaged.
If it is often opened with a bad key, the spark plug will become difficult to open because a part of the spark plug is damaged.
You must ensure that the spark plug wrench used is good so that the spark plug is not easily damaged.
In addition to the two things above, when it comes to tightening the spark plug, you should also pay attention to one more thing.
Do not install the spark plug too tightly because it can also make the spark plug thread sag.
It would be better to use a torque wrench to tighten it.
ID 
EN