I'm sure somebody here knows what I'm referring to on a Pontiac with factory A/C. There are 2 plugs in the 2 front passenger side cylinders - the second in from the front I managed to get, but short of removing the A/C compressor or removing the motor mount on that side, I can't see how it comes out? The other plugs looked good, but since this one is such a bitch it may not have ever been changed. Any help?