60,000 km, 4S suggested dismantling the cylinder to clean up the carbon deposit. Is it necessary?

It is necessary to clean up the carbon deposit, and there are many effective methods.

If the carbon deposit is not cleaned for a long time, the internal passage of the engine will be blocked by carbon deposit when the whole vehicle runs, thus reducing the power of the automobile engine. Carbon deposits and deposits will block the needle valve and valve hole of the injector, which will lead to the untidy closing of the intake valve, the decrease of cylinder pressure and even tempering, which will lead to poor fuel injection, unstable idle speed, poor power, increased fuel consumption and deterioration of exhaust emissions, resulting in low combustion rate. Carbon deposition on the piston top and cylinder head can easily lead to local overheating and gasoline preheating in the combustion chamber, which may lead to engine knocking and other failures. These faults will shorten the service life of the engine.

Commonly used methods are: disassembly and washing, bottle washing and fuel additives.

1, disassembly and cleaning

This method is very direct and rude, but it is usually sent to 4s stores. Disassembly of the engine is complicated. No matter what parts are disassembled every time, their performance will be more or less affected. Need to hire a professional master to disassemble. Dismantling and washing can directly see the carbon deposit in the engine, and the cleaning will be cleaner. But the cost will be higher and technology will be needed.

2, infusion bag or infusion bottle cleaning

This method is also quite common. When the cleaning agent is discharged into the air inlet, the carbon deposit is diluted and softened into slurry, and then burned and discharged from the cylinder. General cleaning objects include air intake, throttle valve, intake valve, oil nozzle, cylinder interior and so on. , but the effect is not as obvious as unpacking and washing.

3. Fuel additives

One reason for carbon deposition is that the fuel is not completely burned and adheres to various parts of the engine, and carbon deposition is formed over time. The main function of additives is to drill into the pores of carbon deposits with strong surface activity, destroy its structure, gradually dissolve these carbon deposits from the metal surface, then burn them with fuel at high temperature, and then discharge them through waste gas. Effective fuel additives, such as PNF stock solution, are non-corrosive, can clean the whole oil circuit, impurities in the oil tank, moisture in the oil tank, high-pressure oil pump, built-in gasoline filter element, nozzle, piston top, intake valve and exhaust valve, and will not block the three components, so the safety is relatively high.