Pull upward on the hose that the PCV valve is in. The PCV valve
will pull out of the hose. The PCV valve is located in the valve
cover.
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Disconnect the PCV valve tube from the PCV valve. Disconnect the PCV valve electrical connector if it has one. Turn the PCV valve counterclockwise to remove from the valve cover. To install, reverse the removal procedure.
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Remove the PCV valve retaining screws. Remove the PCV valve
hose. Reverse the process to install the new PCV valve.
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The PCV valve has a check ball in it, That's what you are
hearing.