Well, after installing my triple pass heat exchanger and fans, I have been adding water, hoping it was purging air out of the system. Went to an early car show this morning and reservoir was at the full mark. 35 miles to the show, raise the hood the the reservoir is below the add mark. I guess that eliminates air pockets. I will have to try and find the paper work on how to remove the front end to check for leaks. I might be able to pressure check it first and see if it is something I can get to without pulling the bumper. I think it was an AFCO unit. I know I did not buy from Revan, due to the price difference. Might have to pay up now. Any experienced advice from the same issue is welcome.