Yep, hissing inside the box makes it pretty simple. Just make sure none of those vapors are floating around and get sucked into the passenger compartment.
Anyways, first the system needs to be completely drained of freon, by law. I know it has a leak but that is no guarantee that the leak completely drained the system. Once that's done, remove both of the hose and metal tube by the dryer. And removing the dryer (silver cylinder) will make this easier. Next the side of the black box facing the engine comes off, either 6 or 8 7mm screws hold the side on. It will be kind of tight but it does come off. There will be one more bolt holding the evaporator in place, it should be located around where the tubes attach to the side of the evaporator. Once removed, the evaporator will slide out (with a little persuasion).
Once you start putting everything together, I would suggest you replace all o-rings and seals.
Anyways, first the system needs to be completely drained of freon, by law. I know it has a leak but that is no guarantee that the leak completely drained the system. Once that's done, remove both of the hose and metal tube by the dryer. And removing the dryer (silver cylinder) will make this easier. Next the side of the black box facing the engine comes off, either 6 or 8 7mm screws hold the side on. It will be kind of tight but it does come off. There will be one more bolt holding the evaporator in place, it should be located around where the tubes attach to the side of the evaporator. Once removed, the evaporator will slide out (with a little persuasion).
Once you start putting everything together, I would suggest you replace all o-rings and seals.
