What are the effects of a faulty exhaust valve in Wuling Zhiguang?
2 Answers
The impacts of a damaged exhaust valve are as follows: 1. Performance issues: After the exhaust valve is damaged, it will be unable to control the amount of exhaust gas recirculation. Excessive exhaust gas participating in recirculation will affect the concentration of the air-fuel mixture, potentially causing difficulties in starting, engine shaking, unstable idling, weak acceleration, and other phenomena that impact engine performance. 2. Smoke emission: A damaged exhaust valve can lead to the car burning engine oil, with blue smoke coming from the exhaust pipe. The exhaust valve serves the function of separating oil and gas. Under normal operation, it only draws exhaust gas and not oil. When the exhaust valve is damaged, it loses its oil-gas separation function, potentially drawing in oil while inhaling, allowing oil to enter the combustion chamber, resulting in the burning of engine oil and the emission of blue smoke.
Last year when I was using my Wuling Zhiguang for transportation, the exhaust valve broke. At first, I just noticed the car's idle was unstable, shaking frequently, and driving felt like riding a seesaw. Later I found out that a faulty valve causes imbalance in the engine's internal pressure, letting exhaust gases run wild—not only did fuel consumption spike (I calculated about 10% more spent on gas), but it also accelerated carbon buildup. If left unchecked, the catalytic converter would suffer, and repairs for clogging would cost even more. I quickly went to a nearby shop to replace the valve—Wuling parts are affordable, costing just over 200 yuan. Now I regularly check the engine bay to prevent similar issues, since this little truck is my livelihood.
