How often should the car PCV valve be replaced?

1 Answers
LucyDella
07/29/25 7:40pm
PCV valve The recommended replacement interval for the PCV valve varies between 96,000 km and 160,000 km depending on the specific vehicle model. Below are detailed explanations regarding the PCV valve: 1. Replacement Interval: Most manufacturers recommend replacing the PCV valve under normal maintenance conditions at 96,000 km; under conservative maintenance conditions, the replacement interval is 48,000 km. In any case, when inspecting the air filter, always check whether the PCV valve is clogged or stuck. 2. Working Principle of the PCV Valve: Installed between the crankcase ventilation system and the intake system, the PCV valve is controlled by vacuum to regulate the flow of oil fumes generated by the crankcase ventilation system into the intake system. The flow rate is higher when the engine is running at high speeds compared to low speeds. 3. Function of the PCV Valve: The PCV valve is a metering control valve. When engine backfire occurs, the PCV valve should cut off ventilation to prevent crankcase explosion.
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