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Are you having cooling issues now? To be honest I'm not a big fan of either aluminum radiators or electric cooling fans. All other things being equal they do not offer better cooling ability.
Engine driven fans generally provide more air flow and are more reliable. I've seen lots of people lose electric cooling fans on the trail for various reasons. You can turn a e-fan off for deep water crossings but I have never personally seen a situation where it would really help. Using them for auxiliary/secondary fans is okay.
Same thing goes for aluminum radiators. If the sizes are equivalent an aluminum version actually has less cooling ability. I think the perception from a lot of people is they think spending 2 to 5 times more on a part makes it better. Also they replace the half clogged and leaking old radiator with a bling aluminum and now the engine stays cool they think it is because the new radiator is great, not because the old one was junk.
Maybe an aluminum radiator holds up better when being bounced around hard off-road, but I have never seen a radiator fail because of this.
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