Dose anyone have any recommendations on getting a stuck oil pressure relief valve. I have soaked the valve with sea foam penetrating oil over night still won't move with a magnet. Also took a little heat tried to heat the valve up it's stuck in the lowest position so hard to get down to. Also started the machine with plug removed hoping that would push it up no luck there. Last thing I tried was pushing air threw the oil filter. Nothing has worked. Has anyone drilled the valve? Was wondering how hard the dowel or valve itself is. Really don't want to pull the motor. Any suggestions would be greatly appreciated.