A friend who knows whether the valve carbon deposit needs to be replaced tells me thank you! !

Does valve carbon deposit need to be replaced? Thank you! ?

Questioner:? Sad little tiger bud

A friend who knows whether the valve carbon deposit needs to be replaced tells me thank you! !

Does valve carbon deposit need to be replaced? Thank you! ?

Questioner:? Sad little tiger bud

|? Number of visits: 5 times. My model: Great Wall? Li Xuan Cross.

Transmission: manual

Displacement: 1.5 liter

Mileage: 7,400 kilometers

Purchase date: June 2065438+01= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =

Mileage: 7,400 kilometers. Valve carbon deposits only need to be removed (except for worn ones). At present, there are several ways to remove carbon deposits from automobiles. ?

1. Chemical methods include chemical cleaning machine to clean the carbon-deposited parts of the engine; Or chemical additives can be directly added to the automobile fuel tank, such as pills, powder or liquid at the gas station, which need to be added repeatedly, which is unsustainable for cleaning up carbon deposits and corrosive to aluminum products and copper products in the engine (ethanol gasoline changed the chemical composition of fuel, proved to be corrosive to the engine after being used in Germany for decades, and Germany announced that it would stop using it completely in 2008).

2、? Mechanical cleaning of carbon deposits is easy to cause mechanical damage to the engine, which is time-consuming and laborious. Generally speaking, chemical cleaning agents are needed to clean carbon deposits.

? 3. The physical method (as shown in the following figure) is to make the fuel burn fully without changing the chemical formula of the fuel, and not to damage the aluminum products or copper products that start the engine.

Whether the valve is worn or not can be judged by a simple and practical method without disassembly.

Take a look and smell, you can judge whether the automobile valve is seriously worn;

First, take a look: there is carbon black and

2. Smell it: Does the tail gas smell at any time (except when it is just started)? ?

Third, look at the exhaust pipe: are there any linear water droplets in summer and any water vapor floating out in winter?