What causes yellowing of spark plugs? What causes redness of spark plugs?

Hello oily sediments. There are oily deposits on the spark plugs, indicating that the lubricating oil has entered the combustion chamber. If it's just an individual spark plug, it may be a damaged valve stem oil seal.

If this deposit is stuck to the spark plugs of each cylinder, indicating oil channeling in the cylinder, the air cleaner and ventilation should be checked for blockage. Remove the spark plug and observe, if it is russet or rust colored, it indicates that the spark plug is normal; If it is oily, it indicates that the spark plug gap is out of balance or too much oil, and the high-voltage line is short-circuited or open-circuited; If it is smoky black, it means that the spark plug is selected incorrectly or the mixture is thick, and the oil is channeled; If there is a deposit between the top and the electrode, when it is an oily deposit, it means that the cylinder channeling oil has nothing to do with the spark plug, when it is a black deposit, it means that the spark plug is deposed with carbon and bypassed, and when it is a gray deposit, it is the additives in the gasoline that cover the electrode and cause a lack of fire; Severe ablation, such as scarring at the tip, cracking of black patterns, or melting of electrodes, indicates damage to the spark plug.

Reddish spark plugs are oil-soluble build-up on the spark plugs, indicating that grease has entered the combustion chamber of the engine. If only some spark plugs are used, it is possible that the cylinder rod skeleton seal is broken. If there is such a build-up in the spark plugs of each cylinder, it means that the cylinder is oily, and the air cleaner and natural ventilation equipment should be checked for blockage.

Its effect is to release the single-pulse high-voltage line sent from the high-voltage transmission line (nozzle wire), penetrate the gas between the two electrodes of the spark plug, and cause a spark discharge to ignite the mixture in the cylinder. The key types are: quasi-type spark plugs.

Spark plug with protruding edge. Electrode type spark plugs. Seat-type spark plugs.

Polar spark plugs. Skip fire type spark plugs, etc.

The spark plug is installed on the side or top of the car engine, and the initial spark plug is connected with the distributor by the cylinder line. The standard operating voltage of the spark plug is at least 10000V, and the high-voltage line is converted from 12V by the spark plug, which is then transmitted to the spark plug.

According to the amount of calorific value, there are cold type and intermittent heat; According to the electrode raw materials, there are nickel-based alloys. silver aluminum alloy and platinum aluminum alloy, etc.; If you are more technically professional, the types of spark plugs are roughly as follows: quasi-type spark plugs:

The hollow skirt of the insulator is slightly retracted into the end face of the shell, and the side electrode is outside the end face of the shell, which is the most commonly used.

Marginal protruding spark plugs: The insulator has a long skirt that protrudes beyond the end face of the housing. It has the ability to absorb a lot of heat. It has the advantages of good stain resistance, and can immediately suffer from the cooling of the air inlet and reduce the temperature, so it is not easy to cause hot ignition, so the heat integration area is wide.

Electrode spark plug: its electrode is very thin, the characteristics are obvious flames, good ignition ability, in the cold season can also ensure that the car engine starts quickly and reliably, the heat range is wide, can achieve a variety of main uses.

Seated spark plugs: The housing and screwed male threads are made into a conical shape, so that the gasket can maintain a stable seal, and thus reduce the spark plug volume, which is very beneficial for the design of automobile engines.

Polar spark plug: the side electrode is generally more than 2 or two, the advantage is that the ignition is reliable, and the gap does not need to be adjusted often, so it is often used in some gasoline engines where the electrode is very easy to burn and the spark plug gap can not be adjusted often.

Surface skipping spark plug: that is, along the surface void type, it is the coolest type of spark plug, and the gap between the core electrode and the end face of the shell is in the same boat.

It may be that the sealing of the spark plug is not very good, the spark plug leaks early, resulting in a particularly small car current, the car can not catch fire, or it may be that the ignition time is particularly early, the mixed gas chain is very thin, the quality of the oil is not good, etc., and then it will cause the spark plug to be red. In this case, it must be repaired in time.

It may be because the power of the potato stool shed is too high, or the temperature is too high, or it may be that the spark plug is dense and the sealing agent is not good, or the combustion is not normal, and the ignition system is too early, which will lead to the redness of the spark plug.

It may be that there are oily deposits on it, it may be that the sealing effect of the spark burial plug is not particularly good, it may be that there is metal oxidation, it is possible that the liquid used is relatively long, and it may be rusty.

Summary. Hello dear, <>

We are glad to answer that the yellowing of the top of the spark plug is due to the high voltage inside the spark plug, which absorbs oil particles in the air, which adhere to the surface of the white insulator and form corona. Therefore, the yellowing of the spark plug does not mean that there is a problem with the spark plug and there is no need to replace the spark plug. Corona does not affect the xing energy of the spark plug, nor is it directly related to the service life of the spark plug.

What to do if the top of the spark plug is yellow.

Hello dear, <>

The yellow color of the top of the spark plug is due to the high voltage inside the spark plug, which absorbs the oil particles in the air, and the oil particles adhere to the surface of the white insulator to form a corona. Therefore, the yellowing of the spark plug does not mean that there is a problem with the spark plug and there is no need to replace the spark plug. Corona does not affect the xing energy of the spark plug, and it is not directly related to the service life of the spark plug.

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Corona is not used as a basis for determining whether to replace the spark plug. Determine if the spark plug is damaged. 3360 Remove the spark plug and observe it, and judge the use of the spark plug according to the following appearance color observation.

The insulator skirt and electrodes of the common spark rattle are off-white, gray-yellow, or light brown. The insulator skirt of a normal spark plug is reddish-brown, the gap between the electrodes is millimeters, and the electrodes show no signs of burning. If the spark plug has oil stains or deposits and the spark plug itself is not damaged, it can be reused after Eggchai has removed the oil trembling stains and deposits.

If the oil contains too much "manganese" antiknock agent, it will affect the manganese precipitation to the spark plug electrode position, and the brick red phenomenon will appear, and the spark plug is not normal or the parts involved in the work will affect the spark plug to appear whitish and black, in addition to the spark plug head may sometimes appear reddish-brown. Redness of the spark plug is actually normal, which proves that the combustion is sufficient. After the engine is working, there will be some residual gas in the combustion chamber, in these residual gases, the water will be attached to the spark plug together with the carbon particles, and if the combustion is sufficient, only the water molecules will react with the iron atoms in the spark plug to form ferric oxide.

Therefore, the spark plug looks red, maroon to be exact.

The spark plug is commonly known as the fire nozzle, and it is an important element of the automotive ignition system. The main function of the spark plug is to generate an electric spark, which ignites the gasoline in the engine cylinder and provides power to the car. Once there is a problem with the spark plug, then the vehicle cannot be started at all, so be sure to check the status of the spark plug regularly.

Under normal circumstances, the spark plug of the ordinary household scooter is basically 20,000 kilometers, although it can continue to be used after 20,000 kilometers, but it is best not to exceed 40,000 kilometers, after exceeding, it will be found that the efficiency of ignition has decreased, resulting in the power of the engine has also decreased, so the spark plug must be replaced regularly.

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1. The ignition time is too early; 2. The mixture is too thin; 3. Related to the oil, if the oil contains too much "manganese" antiknock agent, it will affect the manganese precipitation to the spark plug electrode position, then there will be a brick red phenomenon.

In addition to the fact that the spark plug is not working properly or there is a problem with the parts involved in the work, the spark plug may appear whitish or black, and the head of the spark plug may sometimes appear reddish-brown.

The whitening of the top of the spark plug may be due to too much carbon accumulation in the cylinder, which affects the valve blockage, which will lead to overheating of the exhaust valve or the cooling device can not work normally, and it may also be that the engine mixture is too thin and affects the whitening of the spark plug, and the spark plug is not installed in place, and there is a phenomenon of air leakage, which is also the reason for the whitening of the spark plug.

The spark plug is blackened, which may be due to the large spark plug gap, no high-pressure fire or too late ignition time, which affects the incomplete combustion of the fuel and causes black carbon deposits, excessive fuel injection from the fuel injector or excessive concentration of the mixture caused by dripping, or the spark plug may turn black.

In normal times, we need to maintain and replace spark plugs, which can extend their service life and reduce fuel consumption. Most of the maintenance of spark hail plugs requires regular detection, regular replacement and regular cleaning. When carbon deposits are found in the spark plug, it can be soaked in kerosene for a period of time, slowly brushed with the help of a thin steel brush, and the carbon deposits are removed and dried with compressed air before use.

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A reddish spark plug indicates that there is an oily deposit on the spark plug and that the lubricating oil has entered the combustion chamber. If it's just a single spark plug, the valve stem oil seal can be damaged. If this deposit and spark plug mass sticks to each cylinder, indicating a cylinder oil leak, check the air filter and ventilation for blockage.

The role of the spark plug is to ignite the engine cylinders and thus the engine. It is mainly used in fuel vehicles such as automobiles and motorcycles. During the driving of the vehicle, the spark plugs are in working condition, so the spark plugs are an indispensable part of the fuel engine and should be replaced regularly.

However, the service life of spark plugs of different materials is different, and the spark plugs should be replaced in time if the following phenomena occur: spark plug fracture and leakage, electrode falling off, etc. This will affect normal ignition and will need to be replaced.

If the spark plug is damaged, the vehicle will have a lack of cylinder, poor acceleration, idle jitter and other phenomena. When the electrode gap is too large, resulting in abnormal ignition, it needs to be replaced. When replacing, it should be noted that the replacement of the spark plug must be suitable for the engine model, because the thread length of the spark plug is different in different models, which will affect the ignition of the engine.