Im looking for a pressure relief valve. I want it to open at 5psi. Im going to be putting this on a oil cap on the equinox. The equinox 2.4 has a know pcv freezing during the winter and can blow out the main oil seal. I dont want to spend much more than $10 on the valve. I can only find adjustable ones and everyone says they loose there adjust with age and arnt to reliable. Would like one that has just a spring thats rated for 5psi. Also it cant be to big “for the oil cap” and would need some kind of thread on it for a nut. I made my own custom oil cap for about $20. It just had a valve cover breather on it. Car didnt like it and upped idle fuel trims. So it needs to be a closed system, which i thought i could try some kind of pressure relief valve. What do u guys think?