Can a Faulty Exhaust Valve Be Repaired?

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You can try cleaning it first and then decide whether to repair it based on the situation. A faulty exhaust valve can cause the engine to shake or even stall during idling. Here are the specific details: 1. Effects of a faulty exhaust valve: It will be unable to control the amount of exhaust gas recirculation. Excessive exhaust gas participating in recirculation will affect the mixture concentration, potentially leading to difficulties in starting the engine, engine shaking, unstable idling, weak acceleration, and other phenomena that impact engine performance. 2. Function of the exhaust valve: The exhaust valve serves to separate oil and gas. When functioning properly, it only draws in exhaust gas and not oil. If the exhaust valve is damaged, it will lose its oil-gas separation function, potentially drawing in oil along with the air, allowing oil to enter the combustion chamber, resulting in oil burning and blue smoke emissions.