I've been reading some post here regarding some welding infos. I might get myself a mig 135. My question is, would this be able to weld aluminum. If not, what set-up can.

MIG "can" weld aluminum. You'd have to buy the wire, possibly a special gun liner (teflon) and special shielding gas. The results are not pretty, but it can get the job done. If you want super slick welds on aluminum, especially the thinner stuff...TIG is the way to go.

Welding Aluminum is a steep learning curve. Buy your welder from a welding shop and they will set you up with the right unit.

If you are talking about welding thin aluminum like .063 3003, it can be gas welded. Aluminum is not like steel in its almost universal weldability. Different grades of AL are weldable and others are NOT. If you are working the mostly pure AL like 3003 you just use your regular gas torch with 1100 mig welding wire and AL flux available from a couple of suppliers. I can direct you to a supplier of AL gas welding supplies if this is what you are interested in.

Yes, you can weld aluminium with a MIG unit. First of all you have to use a different shielding gas, CO2 I believe.
Then you need to get a push-pull feeding system, because the aluminium wire is a lot softer than regular steel wire.

It's ok for welding large sheets of aluminium together quickly, but if you're thinking of putting on weld for modification of intakes or repairing cracked transmission housings, as Corey said TIG is the only alternative.

A TIG welder is a most useful thing. You can weld in most materials with it, f.ex. steel, stainless steel, cast iron, copper(!), titanium and most kinds of aluminium/magnesium.
TIG welding generally gives a much better weld than MIG/MAG, its much cleaner, not as hard, a mig/mag weld is harder than the original material therefor more brittle and it's not as many porosities in it. You don't want to use a mig/mag for welding up your gas-tank it could get leaky...

Good luck!!

R.D.

Thanks for the replies. I will visit a local welding store and get some more informations.