Radiator leaking

Its more then likely it will save you money to walk in with the Radiator in hand. It would also be a great opportunity to have them check it out completely and give it a serious cleaning. Once out of the Jeep you might as well put it as right as possible.

I agree, clean it up, apply flux and re-solder the joint yourself.

Get the thick tin-lead solder 50/50. Dont use lead free or electrical stuff. Dont use flux core stuff-Ive never had any success with it.

Use a good plumbing flux.

Prep is everything--make sure its good and shiney to start. Better to use lower grit stuff and work down things than sand off material.

Two things--one which dont apply to your fix here. Id not attempt to fix a corroded leak in the tank section of the rad. Those seem to start inside and work out-so you just end up with a leak again. Those repairs need the thing cleaned out well inside and out. Yours is a seam so should be easy repair. Stress cracks in the tank are another "clean fix"

2nd--If your going to use an electric iron to do the repair--A small home owner one for electrical aint gonna cut it. You need need a hotter one.

I use a small propane torch. Just go slow with the heat. Keep testing the solder against it--it should flow in just like doing the pipes in your house. If you have never done pipes you may want to get a couple fittings and pipe and mess around till you get the hang of it.

The flux is also soldering paste.  50/50 is best yes. lay it flat wire brush it clean...I use one on a drill first then take my knife into the hard to get crack.  Apply flux/soldering paste generiously.  Heat up with a torch just long enough to melt the solder when touching it on the metal.  It will flow around the connection remove flame if you are getting it too hot.   NOT beet red just hot.  When it circles you are done  Test it before painting, you can do that in the veh.  BRIGHT RED........just kidding ,Black

currently it doesn't look pretty but it seems like it would seal and hold tomorrow I will be getting a hotter torch to reattempt it.

Though it doesn't look great the solder as is looks like it probably fixed the leak and looks like it will stay. Are you suggesting I leave it ugly as is and put it back in?

You might be able to get a putty knife or something flat that is metal and heat that solder up and smear it around and smooth it out.

I just dropped it off at the radiator shop for the professional to do it. He said I didn't have it clean enough because to do it right pipe and bracket should be removed completely to clean and reinstall. They wanted $45 for those 2 things and I asked them to replace the messed up filler neck also. Totalling a quote of $90 said should be done by friday. Which is good because supposed to almost reach 70 degrees this weekend.