Aluminum radiators are a big improvement in cooling a Jeep. They are lighter, the tubes are welded (not brazed) to the tank. All this neat stuff is wraped up in nice piece of late 20th Centrury technology.
But, as in everything there is a downside... and that's trail repair.
Have you ever worked with aluminum to repair a break or a crack? It can be tricky the first time. You'd best pack nice torch and a few rods of "Super Alloy" (or the like) in your spares kit. Then it's a good idea to learn to use it BEFORE you go on the trail.
It won't be long before a stick or a tree branch, a cactus needle decieds to eat that radiator for lunch. It's not a question of if it will happen, but when. A little preventative measure may be necessary.
I'd also reccomend two other items:
1. The front of the radiator have a steel mesh screen installed to keep out debries
2. A guard installed on the backside of the radiator to prevent the engine fan from eating it if it:
a. Came loose or bent under stress
b. Bent during a water crossing (I know... you ALL take off the fan belt before crossing).
c. Or didn't let the bow wave keep the water out of the engine compartment[img]/wwwthreads_images/icons/wink.gif[/img]).
Oh, yes one other thing... bring cash... as aluminum radiators are still pretty spendy to buy and to repair as compaired to their standard ol' brass counterparts. This ain't a rag on them, it's just fact...kinda like compairing EFI and Carbs. Both have thier place, both have their drawbacks and high points.
You pay your money and take your choice (or is that chances?).