What are the effects of a faulty exhaust valve in the BYD F3?

[VonKendra]

Here are the impacts of a damaged exhaust valve: 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 ignition and performance of the air-fuel mixture, thereby impacting the engine's power, especially during idle, low speed, light load, and when the engine is cold. The recirculated exhaust gas will significantly affect engine performance under these conditions. 2. A damaged exhaust valve can cause the car to burn oil, resulting in severe blue smoke from the exhaust. This is because the exhaust valve also functions as an oil-gas separator. When working properly, it only draws in exhaust gas without sucking in oil. If the exhaust valve is damaged and loses its oil-gas separation function, it will draw in oil along with the gas, allowing oil to enter the intake manifold and combustion chamber, leading to oil burning and severe blue smoke from the exhaust.