Its not the torque on the nut that's the problem. Its the shaft spinning as you try to loosen it that is. On a stock 5.0 one, you can stick a screwdriver in the fan to stop it from spinning, but it may bend the fan some. If its a 3G, no such luck since the fan is internal. If you can't get it loose, take it to a tire store or car repair place and have them zip it loose.