How often should the car PCV valve be replaced?

[JosephRose]

The car's PCV valve does not have a fixed replacement interval and is generally replaced only when it malfunctions. Here is a detailed introduction to the car PCV valve: 1. Introduction: PCV is the abbreviation for Positive-Crankcase-Ventilation, which means the active ventilation control system for the crankcase (or oil pan). The PCV valve consists of a valve body, valve, valve cover, and spring, and cannot be disassembled. 2. Main Function: It directs the gases from the crankcase into the intake manifold through the PCV valve, with a small amount of air entering the intake manifold directly from the air filter via the PCV valve. This prevents phenomena such as icing at the throttle, incomplete combustion, and worsening emissions. It also prevents blow-by gases from entering the atmosphere and keeps the engine oil from deteriorating.