Thank you and although I have looked at this very closely this thread does not tell me which line is the return line, just the line they used. If I send it through the cooler and then the AC unit I am heating the oil back up so the cooler is not as useful as sending it through the AC unit and then the cooler. This will give me the best results. The top line is normally the return line but not in all vehicles. I guess now the dealership is open Ill give them a call and ask service. I'll post my findings here when I finish with pictures of how I did mine. Thank you for all your help!