I have a cooling system leak a while back and i've replaced everything except the heater core and the radiator.
Cooling system runs ok now except there's still a slight leak somewhere near the upper radiator hose/radiator area.

My radiator is not holding pressure and i can hear hissing sound coming from the upper radiator hose/radiator area but i can't see any coolant coming out.

Appreciate if someone can tell me how to check for leak with the radiator out of the Jeep.

Thx in advance.
About test was done with a radiator pressure tester i loaned from O'reilly.

 

What happened with me (and I'm assuming you) was I had a slight hissing from the tranny cooler inlet hose. The new radiator was slightly too small, therefore it was a slightly loose connection. I disconnected all threaded connections from the Rad and coated them with a little silicone. Everything is perfect now with no unusual noises. Hope this helps.

 

It could be the plastic end tanks leaking from cracks.

There are pressure testers that hook directly to the cap. I would try to get access to one and use it.

 

Thx for the reply.

I think i found it, i'm in the middle of removing the radiator (first time) to either solder the cracks or JB weld it (that's what i read) but ran into a problem with removing the transmission line.

Any help pls.

 

....can't remove it.

nvm....figured out!
"quick connect release tool"

 

Can i solder (not sure if it is aluminum or not, oem tho) a crack on my radiator on the core near the tube?
Or should i just replace it?

Pls help.
Thx in advance.

 

Went ahead i got a new 2 roll radiator from napa , worked out much cheaper than radiatorbarn's.