What are the symptoms of a clogged exhaust valve?

1 Answers
McAthena
07/30/25 5:50am
Car exhaust valve failure can lead to issues such as incomplete closure of the exhaust gas recirculation valve and flashing of the malfunction indicator light. The function of the exhaust valve: The role of the car exhaust valve is to allow exhaust gases to be recirculated into the cylinder for combustion. This small amount of exhaust gas reduces the temperature in the cylinder during combustion. Since NOX is generated under high-temperature and oxygen-rich conditions, it inhibits the formation of NOX, thereby reducing the NOX content in the exhaust gases. Effects of a damaged exhaust valve: After 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 engine idling, low speed, light load, and when the engine is cold, where the recirculated exhaust gas will significantly affect engine performance.
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