How to clean the carbon deposit in Tiguan valve?

How to clean the carbon deposit in Tiguan valve? How to clean the carbon deposit in Tiguan valve? The cleaning method of Tiguan valve carbon deposit is that the carbon deposit is not serious, and the disassembly-free cleaning method is adopted, and special cleaning agent solution is added for cleaning; If carbon deposition is serious, open the cylinder head to clean the valve and cylinder block. Carbon deposition in the valve will lead to difficulties in starting the cold car, idling jitter and increased fuel consumption. The method of cleaning valve carbon deposit is as follows: 1. Add "fuel treasure". Adding detergent to gasoline is simple, but the effect is not good. In daily use, Fuerbao has little cleaning effect; 2. "infusion bag or bottle." The infusion bag or bottle is similar to that in the hospital. The cleaning liquid is injected into the valve, and the cleaning effect is good. It is a more effective cleaning method without disassembling the automobile engine; 3. Remove the engine and cylinder head. Thorough disassembly and cleaning is the most direct cleaning method and the best cleaning effect. @20 19