Are large square spark plugs and small square spark plugs interchangeable

The replacement of the spark plug is closely related to its structural type and calorific value, as long as the structural type, calorific value and thread length are consistent with the original car, it does not matter whether it is generous or small, it is interchangeable.

Upstairs don't know how to spray blindly, you put the small square spark plug on the big square car and try it. , Do you install it, the size square refers to the form and size of the base, which cannot be interchangeable at all, and can the high-voltage line be connected firmly? Whether they are small or generous depends on the calorific value, ignition position, spark plug length, spark plug material (that is, the temperature in the cylinder that can be adapted) and different ignition strengths of materials, for example, TSI is very special, the temperature of direct injection in the cylinder is very high, and the pressure is also different.

It's too much, don't say too much, in short, it can't be interchangeable, it can't be installed at all, I asked if you have repaired the car downstairs, or have you learned, I don't understand so simple, it's funny.

Happiness is better than worry, and what he said is basically right.

Generous and small square should generally refer to the external size of the spark plug. It's just a question of whether you use a big sleeve or a small sleeve. Other parameters are the same, but the size of the foreign side has nothing to do with it.

If it is not interchangeable, the size and size are different, and it is not interchangeable at all.

How the spark plug works:

The electric plate of the spark plug ignites the mixture in the cylinder through repeated and continuous power generation ignition, and at this time, the other parts of the ignition system generate a timing of high-voltage electrical pulses, forming sparks and generating the energy required to provide the engine power output.

The structure of the spark plug is made of a slender metal electric plate through a ceramic material with insulating function, and there is a metal shell around the lower part of the insulator, which is screwed on the cylinder head in a screw way, and an electrode is welded at the bottom of the metal shell to form a grounding effect with the automobile body. In addition, the ends of the electrodes** must be separated by a small discharge gap.

Then, the high-voltage current from the distributor will pass through this ** electrode to conduct electricity, and then discharge in the discharge gap at the bottom end, at this time, the spark plug will play its role to produce a spark combustion mixture, and the engine will get energy and output power.

It can be seen that the spark plug is a device that ignites the gasoline and air mixture gas that enters the engine combustion, works under the harsh conditions of high temperature and high pressure, and is one of the wearing parts of the gasoline engine, which plays a very important role in the operation of the engine, and whether the car is fuel-efficient or not, whether the operation is stable, has a great relationship.

The spark plugs must be replaced with 4 of them. This is because the discharge gap of the old and new spark plugs is not the same as the new resistance, and if they are not all replaced, the car will be prone to shaking, acceleration difficulties or increased fuel consumption, and the power of the 4 cylinders will be unbalanced.

How do I replace a spark plug?

1. When replacing the spark plug, it is necessary to prepare tools, such as wrenches, hexagonal sockets and long adaptors, among which the hexagonal sockets used in automobiles are generally 16 mm.

2. Wait until the engine cools down for disassembly. When disassembling, first clean the ignition coil and the nearby oil stain and dust, then unplug the wiring harness plug of the ignition coil, and unscrew the fixing bolt of the ignition coil with a sleeve.

3. Pull out the ignition coil, this step requires some effort, and use the sleeve to loosen the spark plug after removal. After loosening the spark plug to be removed, use a thin hose to blow the dirt around the spark plug clean.

4. After removing the spark plug, insert the ignition coil that was removed before into the spark plug that was loosened to loosen it, take out the spark plug, and replace it with a new spark plug.

The Chief Mechanic will advise you to replace them all. Theoretically, even if the spark plug of the same brand and model is replaced, the discharge gap of the old and new spark plugs is different, and the resistance value of the old and new spark plugs is also different. If all spark plugs are not replaced, problems such as shaking, difficulty in acceleration, and increased fuel consumption will occur.

This means that different spark plugs may cause different ignition angular energies, resulting in an imbalance in the power of the four cylinders.

Can't I continue to use the spark plug after the replacement cycle?

The daily maintenance parts of the car have a cycle, and the replacement cycle of the spark plug is generally 2-100,000 kilometers (different material cycles are different), but it does not mean that it can be used until the deadline of the official Qiaozhao, because most products have a surplus in the design life, so it will not cause fatal damage to the engine so soon after the cycle, but after exceeding the mileage, the electrode wear will be accelerated, and the electrode gap will become larger. Unstable ignition requires higher voltages. Mild symptoms include acceleration weakness, poor ignition, and fuel consumption.

In severe cases, a broken electrode may damage the engine. Therefore, it is recommended that you replace it according to the specified period, and there will be questions and blind questions in other parts.

All spark plugs have a certain lifespan, and the quality and life of the same batch of products should be very close. Since there is a problem with one or two spark plugs, it means that the time limit for the other spark plugs is almost up. So replace it in advance to prevent trouble later.

In addition, the cost of replacing all parts is higher than the cost of replacing one or two parts. As a repairer, of course, I hope that the renter of Che Xiaoyuan can replace as many parts as possible.

In general, all four spark plugs for car repair are replaced. Theoretically, even if it is replaced with the same brand and model, the discharge gap of the old and new spark plugs is not the same, and the resistance value of the new and old spark plugs is not the same.

There is also a spark plug has a certain life, the product quality and life of the same batch should be very close, since there are one or two problems, it means that the other spark plug limit is also coming. So replace them together to prevent future troubles.

The regular maintenance parts on the car have a cycle, and the replacement cycle of the spark plug is generally 20,000-100,000 kilometers (different material cycles), but it does not mean that it must not be used when it comes to the official period, because most products are surplus in the design life, so it will not cause fatal damage to the engine so quickly after the cycle.

However, after the mileage, the wear of the electrodes will be accelerated, the electrode gap will become larger, the ignition instability will have a higher demand for voltage, and the light one will show symptoms such as acceleration weakness, ignition misfire, fuel consumption, etc., and the electrode may break and damage the engine in serious cases, so it is recommended that you replace it according to the specified cycle, and there will be problems in other parts.

Photo by Zhu Zhenchang) @2019

In life, we commonly use spark plugs are copper-nickel alloy spark plugs, platinum spark plugs, iridium spark plugs, copper-nickel alloy spark plug material is the worst, so the life is the shortest, generally 3-50,000 kilometers to replace once, and platinum spark plug electrode material is better to replace once in 6-80,000 kilometers, iridium spark plug life is the longest in 100,000 kilometers. However, these data can only be regarded as estimates, and there is a certain relationship between the life of the spark plug and the working conditions of the car engine and the driving habits of the driver.

There are many reasons for the short life of spark plugs, such as poor quality of gasoline, often go to some private, substandard gasoline quality small gas stations to refuel, resulting in insufficient combustion, which is the most harmful. And often run some cars with bad road conditions, such as often used to run construction sites, mountain roads, muddy roads, etc. All of these factors will lead to a shorter spark plug life, and the replacement cycle needs to be brought a little earlier.

If the car often runs at high speeds, or runs in good road conditions, the replacement cycle can be postponed a little.

When the spark plug is in use, its electrodes and skirt insulators will have normal carbon deposits, and if these carbon deposits are not cleaned for a long time, they will accumulate more and more, and eventually lead to electrode leakage or even failure to jump over. Therefore, the carbon deposits should be removed regularly, and the spark plugs should not be cleaned until they are not working. The air filter should also be cleaned regularly to prevent dust from entering and combusting with the mixture, which will prevent corrosion of the spark plug.

If you hold the steering wheel with your hand when the engine is idling, you can feel the engine shaking regularly. The jitter disappears after the acceleration, which indicates that the performance of the spark plug has begun to decline, and it is time to think about whether the service life of the spark plug is close to its life, and it can be considered to replace it. In addition, when the car is driving in a certain speed range (e.g. 30 km h to 60 km h or when upshifting), the engine has a "shrugged" phenomenon.

At this time, the rapid acceleration, the engine power is stuffy, and the usual driving power will also feel obviously insufficient, accompanied by the increase in fuel consumption, and even the exhaust gun, sometimes black smoke, which indicates that the performance of the spark plug is seriously reduced, if other problems are ruled out, the spark plug should be replaced immediately.

Every brand of car has a replacement standard, if you don't change it: it is difficult to ignite, acceleration is weak, and if the spark plug is blown up, then you have to replace the cylinder head.

I changed it before 50,000 yuan, and 95% of the time I ran was the road to and from the new urban area, and I felt that I could continue to use it. It mainly depends on your usual maintenance and driving habits of the car. Don't worry, change it as soon as possible, after all, you don't know how the original owner used the car before.

My colleague's Yinglang is more than 40,000, and he has been dragging and refusing to change the spark plug, and finally lacks the cylinder, spark plug and 4 ignition wires.

Hello dear, the spark plug can't be replaced casually. First, the specifications and models of spark plugs related to different models and the calorific value and thread diameter of the relevant spark plugs are different. Second, if spark plugs of different specifications are installed at will, it is likely to cause problems with the vehicle's engine.

Third, under normal circumstances, if the spark plug is replaced, it must be replaced by a regular repair shop or a 4S shop. Be sure to choose the same specification model. Kiss your manuscript shouting good, I wish you a happy family, if necessary, you can continue to sell the stool consultation, I will be waiting for your reply I wish you good luck, everything goes well, and a happy life!

Kiss kiss kiss.