Ok so in addition to all the other repairs I have going on with my 2002 OZ Rally I have to replace the AC compressor, condensor, dryer, and expansion valve. Im pretty sure I can do it all in a day. However I cant find out how to replace the expansion valve. Does anyone know how or done it before? Also from what Ive read on other threads you can rent the machine to evacuate the ac system before charging it. Does anyone where the pump hooks up at to evacuate the system? Never done it. Also wondering if I should take it in to get charged or buy the cans at autozone? Any advice would be great!