What are the symptoms of a faulty exhaust valve in a car?
1 Answers
Damage to the exhaust valve can cause the engine to shake or even stall during idle. The characteristics of a faulty exhaust valve are as follows: 1. When the exhaust valve is damaged, it cannot control the amount of exhaust gas recirculation. Excessive exhaust gas participating in recirculation will affect the concentration of the air-fuel mixture, leading to difficulties in starting, engine shaking, unstable idle, weak acceleration, and other phenomena that impact engine performance. 2. The exhaust valve serves the function of separating oil and gas. When functioning normally, it only draws in exhaust gas and not oil. If the exhaust valve is damaged, it loses its oil-gas separation capability, potentially drawing in oil along with the air, allowing oil to enter the combustion chamber. This can result in oil burning and the emission of blue smoke.