The fanis not flush as I stated there is a gap of about1/2 and 3/4". I am running it through a relay. The fins are clean, snow is not blocking the air flow although i am relying on the electric fan due to the speed of the vehicle. I am plowing my park and not traveling fast. I am not sure about the thermostat as it is new but you know how that goes, new hoses and water pump and heater core. The start temp on the fan switch is 175 degrees. I am thinking the rad needs cleaned as I got this used and is the only part I have not recently put in. Caddy's used to pull trailers before trucks were popular so i think the 4 core should handle the job. more later....
