[Daily car maintenance] Cold knowledge that old drivers don’t know: Why can’t the spark plug be replaced separately?
Bernice 
7 Hello everyone, this is a column focusing on car repair and maintenance. There are car mysteries you don’t know, and it will teach you how to avoid the big pits on the road of car ownership. I believe that not only you but also many people have a certain sense of obscurity about the car aftermarket, which will help you uncover the unknown stories of car repair and maintenance.
Recently, the editor has received many questions from netizens, among which the replacement of spark plugs can be said to be the most. Many netizens are very curious about why sometimes only one spark plug is broken, but the auto mechanics ask for all the spark plugs to be replaced. Is there any scam behind this?
In this issue, the editor will give you an in-depth interpretation of why spark plugs can not be replaced separately, but must be all together!
What is the effect of a spark plug?
If a gasoline engine wants to work, it must ignite the mixture with a spark plug, and the spark plug naturally becomes a daily consumable of the car. Like brake pads and tires, they are common vulnerable parts, but the specific replacement cycle is different.
How long is the life of the second spark plug?
After the average household model runs tens of thousands of kilometers, the spark plugs basically reach their life. However, the replacement cycle of spark plugs of different materials is different. About 20,000 kilometers of nickel alloy, 40,000 kilometers of platinum, 80,000 kilometers of iridium gold, and 100,000 kilometers of platinum iridium gold. There is even more terrifying ruthenium up to 150000 kilometers.
Well, no matter what kind of spark plug can not escape the fate of replacement. Whether you go to a 4S store or a repair shop or even a roadside stall, you will be told in unison that all your spark plugs must be replaced, even if only one is damaged.
What is the reason why the three spark plugs can not be replaced singly?
Since all technicians say so, there must be a reason behind it. Inside the engine, the spark plug ignites the mixture combustion to drive the piston to rotate the crankshaft to achieve the driving force.
In fact, after the life of the spark plug, the ability to ignite is not as good as it used to be. If the spark plugs on an engine are new and old, it is bound to cause different ignition capacity, and the combustion effect will be different when reflected on the mixture.
The combustion effect is different, that is, the workmanship of each cylinder is uneven. As a result, the engine loses its balance on the combustion interface. Originally, it is very difficult for the balance of the engine to rise. If another cylinder does not work well, the engine will shake frighteningly. In fact, the same is true of multi-cylinder engines, but it is only a matter of jitter.
Is it necessary to replace all the four ignition coils at the same time?
If it is actually necessary in a strict sense, after all, the ignition coil drives the spark plug to ignite, which will naturally have a certain impact on the working condition of the spark plug.
If it is actually necessary in a strict sense, after all, the ignition coil drives the spark plug to ignite, which will naturally have a certain impact on the working condition of the spark plug.
However, from the perspective of practical application, in most models, the impact of new and old ignition coils on balance is not obvious, far less than that of spark plugs. If there is damage to a separate ignition coil, you can try to replace one first. If not, consider whether it is necessary to replace them all.
Not only spark plugs but also pistons that cannot be replaced separately!
In fact, it is not only the spark plug that requires high replacement, but also the piston assembly, which has higher requirements in the interior of the engine. Even if there is a damage, it must be replaced with all the pistons, and the cost is frighteningly high.
In fact, it is not only the spark plug that requires high replacement, but also the piston assembly, which has higher requirements in the interior of the engine. Even if there is a damage, it must be replaced with all the pistons, and the cost is frighteningly high.
Automobile is a product with high demand for balance, both spark plugs and pistons play a vital role in balance, so the requirements on them are naturally more stringent. Of course, the balance is much more than that, but also tires, brakes, shock absorbers and many other parts.
The car is a complex complex, which is far from as simple as we thought. There are really a lot of things for car owners to learn.
Unmeized reprinting is prohibited!
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