Increased airflow across the radiator. It's cooler. What condition is the coolant in? When was it last power-flushed? Not just a coolant swap like a Jiffy Lube, but where a pressurized water source is hooked up to the cooling system. This flushes rust and contaminants from the system.
Does this have a direct-drive fan or a clutch-type fan? Is there a big aluminum disc behind the fan? If so, can you see moisture on it? Or "gunk"? Grasp 2 blades opposite each other. Wiggle them front and back. Is there any play? If so, replace the fan clutch. Is the fan in 1 piece? If not, replace it. Has the fan become bent? If so, replace it.
Monday, December 19th, 2011 AT 3:45 AM