What Happens When the Exhaust Check Valve Fails?

[DiIsabella]

Problems that may occur when the exhaust check valve fails include: 1. The vehicle may burn engine oil; 2. The engine may experience unstable idling or even stall; 3. The car's exhaust may appear darker in color and emit a strong odor. Below is an introduction to the exhaust check valve: The exhaust check valve serves to separate oil vapor and can also redirect a portion of the exhaust gases back into the combustion chamber for reburning. When the engine is running, the high temperatures can cause engine oil to vaporize. This vaporized oil, mixed with some exhaust gases, reaches the exhaust check valve. The valve is responsible for separating the oil vapor and then redirecting the remaining exhaust gases back into the combustion chamber for secondary combustion.