I finally got it off i had to break it off to allow an exact socket to fit over the nut then i put a big pipe over the wrench and got it that way when i got it out it was green does that mean anything but the new one i put in wouldn't screw in all the way i got it as close as i could but it wouldn't go any further would that hurt its readings at all it needs about 3 more full turns i felt down there and i don't think its leaking any air but any more info would be appreciated thanks