Originally Posted by Air Randy
they always put in a 4 core aluminum radiator with high flow electric fans as the surface area of the stock FJ40 radiator is too small. .
x2. i ran a cheapy aftermarket four core that fit in the stock cradle with a taurus 2spd fan (like ford taurus). only time i had overheating issues was when the water pump puked on me. on a snow run, i was doing a long slow hill climb so i put the fan to high and it got too cold