What is the PVC valve in a car?
2 Answers
The PVC valve in a car is a component of the Positive Crankcase Ventilation (PCV) system on the engine. Its main functions are: to direct gases from the crankcase into the intake manifold through the PCV valve, and to allow a small amount of air to enter the intake manifold directly from the air filter via the PCV valve. Additional information: If the PVC valve malfunctions, it can affect the car in the following ways: the engine may shake during operation, idle unevenly, and emit large amounts of white smoke from the exhaust pipe. Since it is located in the crankcase, a faulty PVC valve can cause internal corrosion, accelerate wear, and further shorten the engine's lifespan.
The PCV valve is a small valve on the engine responsible for handling exhaust gases in the crankcase. During engine operation, some unburned fuel mixture can leak into the crankcase. If not promptly removed, it can cause engine oil degradation, component corrosion, and even lead to oil seal leaks. The PCV valve uses a vacuum hose to draw these exhaust gases into the intake manifold, where they are sent back into the combustion chamber to be burned off. This valve is particularly prone to carbon buildup and clogging. When stuck, the engine may emit blue smoke, experience unstable idling, and show significantly increased fuel consumption. Every time I change the engine oil, I ask the mechanic to check this component as well. For most family cars, it should be replaced after about 50,000 to 60,000 kilometers. Don't underestimate this small part—if it fails and isn't repaired in time, it might lead to major engine repairs.