What is the phenomenon that the valve is not tightly sealed?

Valve oil seal has two major functions, one is to prevent the mixture of gasoline and air and waste gas from leaking, and the other is to prevent engine oil from entering the combustion chamber. The consequences of oil leakage from the heart valve oil seal are very serious, so it is necessary to replace the heart valve oil seal in time.

First, the oil leakage from the valve oil seal will burn the engine oil that seeps into the combustion chamber due to the lax sealing of the valve oil seal in the combustion chamber, and the exhaust gas will generally emit blue smoke;

Second, if it lasts for a long time, the valve is prone to carbon deposition, which leads to lax valve closing and insufficient combustion;

Third, it will also cause carbon deposition in the combustion chamber and fuel nozzle or blockage of the three-way catalyst;

Fourth, it will also cause the engine power to decrease, the fuel consumption to increase obviously, and the related parts to be damaged, especially the spark plug working condition to decrease obviously.