What should I do if the exhaust valve of crankshaft is loud?

Go to the repair shop to replace it. According to the inquiry, the automobile maintenance technology network shows that.

1, the oil-gas separation performance of crankcase ventilation valve system components decreases, resulting in engine oil entering the combustion chamber through crankcase ventilation system for combustion. Due to the poor ventilation of the crankcase ventilation system, the crankcase is overstocked, and the amount of oil entering the engine combustion chamber through the piston ring gap increases with the increase of intake stroke.

2. The most important component of the crankcase ventilation system is the PCV valve, which is usually installed between the engine valve cover and the intake manifold behind the throttle. Its function is to control the amount of fresh air entering the crankcase and the amount of crankcase exhaust entering the intake pipe by using the negative pressure of the intake manifold, so as to ensure that the crankcase pressure is kept within the specified range and minimize the damage of exhaust gas to the engine.

3. The fault phenomenon is mainly caused by the blockage and sticking of the PCV valve. Excessive crankcase pressure causes oil and steam to reversely run into the intake pipe in front of the throttle body, causing the air filter to be dirty.