I understand what needs to be done but how do you do it? its too tight, i can't get to it from the top. Do I go from underneath?

my 2001 v70 is doing the exact same thing, mine is a 5 speed manual-i'm taking it in this morning for repair. I've noticed that since the low idle problem my a/c has been acting poorly-cold for short periods of time then blowing outside temp air, can't even keep condensation off the windshield most ...