98 obw 2.2 251k. AC has not worked in years. System has been evacuated and open for a long time. I was going to replace compressor only until I saw black sludge like oil dripping from the compressor and metal bits. Tried to flush all components and it was fruitless. One thing led to another and I found myself replacing everything including hoses when bolts snapped. I am hear to tell you that you can remove the evaporator in 30 minutes. No you do not need to remove the dash.