I was wondering if anybody ever ran into this problem before. Driving around town car runs cold no problems at all. Once I get onto a highway the temp just climbs and climbs. I have a recored radiator and 180 t-stat in the car already. I didn't have this problem with the old motor. I was starting to think that the fmic is to high and blocking the rad but then again I have taken out the a/c. Bad move. Any input would be great thanks.