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You can find our upgraded PCV valve here: www.rkxtech.com/collections/p...
Testing for a ruptured PCV valve is simple! If you feel vacuum coming out of the top vent hole on the PCV valve cap your PCV valve has an issue. This vent hole is simply a breather to let the PCV valve move up and down freely. You will never feel / hear vacuum from it when it is working properly.