I know there are many threads out there and i thought i had read them all to get the expansion valve off my 86 420sel, but man I just cant do it. ive heated wrenches and all kinds of stuff but i cant get the top lines off for the life of me. is there something im missing here? any help is appreciated. and also how much mineral oil do i add before i vacuum the system and can u just crack open a line at the drier and pour a little in? thanks for the replies in advance.

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1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual