Why does the spark plug be changed to 4? Just another one, isn't it?


Spark plugs are not often referred to, but if the spark plug aging, the overall performance of the vehicle will be affected, the replacement of the spark plug is also a part of daily maintenance, just like oil and three filters.



I wonder if you have noticed that after finishing the maintenance, the repair master will check the spark plug for you to see if it needs to be replaced. If one or two items need to be replaced after inspection, they will be changed to you. Obviously, the one or two one is broken. How do we change all 4?

Today we are going to talk about why spark plugs change 4 times.

What is the spark plug for?

Let me first find out what the spark plug is for.

It is a gasoline engine ignition system that introduces high voltage current into the cylinder to generate electric spark to ignite the components of combustible gas. It is mainly composed of wiring nuts, insulators, wiring screw, central electrode, side electrode and shell, and the side electrode is welded on the shell.

In short, the car engine needs to burn fuel, the spark ignition of the fuel is produced by the spark plug, so the good or bad of the spark plug affects the working effect of the engine.

The most important factors are the gap between the spark plug electrodes, the gap is too small, the spark is weak, and it is easy to leak out because of the production of carbon; the gap is too large, the breakdown voltage is higher, the engine is not easy to start, and the "fire" is easy to happen at high speed.

Can't the spark plug continue to be used after the replacement period?
The routine maintenance parts on the car have a cycle, the replacement cycle of the spark plug is generally 20 thousand -10 million kilometers (different material cycle), but it is not said that the official deadline must not be used, because most of the products in the design life are out of surplus, so it will not be so fast after the cycle. The engine causes fatal damage.

But after the super mileage, the wear of the electrode will be accelerated, the electrode gap becomes larger, the ignition instability is higher for the voltage demand, the performance of the light person is the symptoms of acceleration weakness, ignition loss, oil fee and so on. There will be problems in other parts.



Can the spark plug be changed only one?
The general repair will change all of you. In theory, the gap between the new and old spark plugs is different even if the gap between the new and old spark plugs is different, and the new and old spark plugs are not the same. Not all the replacement will be jitter, the acceleration difficulty and the increase of fuel consumption. It means that the spark plug may cause different ignition angle energy difference, which leads to the four cylinder power. Balance.


In addition, the spark plug has a certain life span, the product quality and life of the same batch should be very close. Since there are one or two problems, the limit of other spark plugs will also be reached. So change it together to prevent future trouble.

There are four common electrode materials in the market, such as copper, nickel alloy, platinum and iridium gold (platinum and iridium are commonly called precious metals). The electrical conductivity of metal is higher in turn from left to right (copper nickel alloy < platinum < Gold Iridium gold). The voltage required for ignition decreases from left to right (copper > nickel alloy > White Gold > iridium gold). So the precious metal spark plug is less loaded to the engine and is beneficial to reducing the fuel consumption; and the life of the precious metal is longer, and of course the price increases with the increase of performance.



Can you change the spark plug?


Some people say that it is expensive to maintain a car, and it needs to replace spark plugs. There are more expenses. It's really annoying. Can you replace the spark plugs? It can save money.



Yes, the premise is that you need to have a strong practical ability. The following is a brief description of the process of cleaning up the spark plug. The specific cleaning time will be very different from the electrical circuit and the difficulty of cleaning.

The general working process is to dismantle the ignition coil first, then use the special spanner to remove the spark plug, so we must clean up the dust around in advance. The following is the clean spark plug. There are many ways to clean the spark plugs specifically.

Many talented people even study unconventional methods, useful white vinegar, useful clean toilet, and toothpaste, but the general clean spark plug is used as a carburetor cleaner and other organic solvents, first soaked for a period of time, then scrubbed, dry, then installed to continue to use.


But if the spark plug has been seriously corroded or damaged, it must be replaced, otherwise the spark plug will further damage the engine.

For the owners who want to change the spark plug, the small editor also has a suggestion, do not blindly pursue the spark plug alloy material, more can not simply think that the more expensive spark plug for the engine combustion effect is better, this is a misunderstanding.

The combustion effect of the engine is related to many factors, and the spark plug is only one of the aspects, but the use of a better alloy spark plug can greatly extend the replacement period.