What are the impacts of a faulty engine exhaust valve?

1 Answers
LaLuna
07/29/25 7:04pm
Damaged exhaust valve impacts are as follows: 1. Unable to control exhaust gas recirculation volume: After the exhaust valve is damaged, it will be unable to control the exhaust gas recirculation volume. Excessive exhaust gas participating in recirculation will affect the mixture concentration, and the car may experience difficulties in starting, engine shaking, unstable idling, weak acceleration, etc., affecting engine performance; 2. Loss of oil-gas separation function: After the exhaust valve is damaged, it may cause the car to burn engine oil, with blue smoke coming from the exhaust pipe. The exhaust valve serves the function of oil-gas separation. When working normally, it only sucks exhaust gas and not oil. When the exhaust valve is damaged, it will lose the oil-gas separation function, and may suck in oil while inhaling, allowing oil to enter the combustion chamber, resulting in the burning of engine oil and the emission of blue smoke.
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