What are the effects of a faulty exhaust valve?
2 Answers
The effects of a faulty exhaust valve include: 1. Inability to control the amount of exhaust gas recirculation, excessive exhaust gas participating in recirculation, affecting the concentration of the air-fuel mixture, which may lead to difficulties in starting, engine shaking, unstable idling, and weak acceleration, impacting engine performance; 2. Causing the car to burn 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 loses its oil-gas separation function, potentially sucking in oil along with the gas, allowing oil to enter the combustion chamber, resulting in oil burning and blue smoke emission. Reasons for exhaust valve damage: 1. Quality issues with the exhaust valve itself; 2. Improper maintenance; 3. Poor fuel quality; 4. Aging of the exhaust valve.
A faulty PCV valve is really annoying. My car had this issue - initially it was rough idling, the car kept shaking like an earthquake, making driving nerve-wracking. Fuel consumption also skyrocketed, dropping from 500km per tank to just over 300km, emptying my wallet at gas stations. The engine started leaking oil too, with sticky oil stains attracting dust and making things worse. The exhaust became foul-smelling, not just polluting the air but potentially failing emissions tests. If left unrepaired, it can damage the oxygen sensor or intake system, doubling repair costs. I recommend regular PCV valve checks and immediate replacement if you notice abnormal odors.
