What is the inspection method for the PCV valve?

1 Answers
VanLila
07/29/25 9:34pm
The inspection method for the PCV valve is as follows: 1. First method: Let the engine idle, remove the PCV valve from the cylinder cover hose, and check if the PCV valve is clogged. If you place your hand on the PCV valve interface, you can feel a strong vacuum suction. 2. Second method: After reinstalling the PCV valve, remove the crankcase intake pipe from the air filter, lightly cover the pipe opening with a thin piece of paper. When the pressure in the crankcase decreases (after about 1 minute), the thin paper should be noticeably sucked towards the pipe opening. Additionally, after stopping the engine, remove the PCV valve and shake it by hand to check. If you hear a "click" sound, it indicates that the PCV valve is flexible and usable.
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