Is changing PCV valve easy?
Replacing a PCV valve is a very easy repair to do. Often this task requires no tools at all, especially if the valve is held in place with only the rubber grommet. For PCV valves that screw into the base, you can use a crescent or adjustable wrench to hold the base to unscrew the valve if needed. via
How can you tell whether a PCV valve is bad and needs to be replaced?
One way to check whether a PCV valve is functioning is to remove it from the hose or tube and shake it. If you can hear a metallic rattling noise, it's likely in good working order. If you do not hear anything when you shake the valve, it is likely that it is no longer opening and closing like it should. via
Can I drive with a bad PCV valve?
Although its never recommended to drive any longer than you should with a damaged component, driving 12 hours with a damaged PCV valve could be very risky. via
Can bad PCV valve cause low oil pressure?
Leaking in the vehicle's oil passages can also lead to low pressure. Internal oil leaks can be caused by a myriad of factors, including worn piston rings and valve seals or PCV valve failure. via