robdiddy

Saturday there was a massive rain storm and sudden onset hailing, my XJ rocked through it with ease. Sunday as I went to stores nearby to by to contemplate what digital camera to upgrade too..

I walked into Best Buy and looked behind me and there was a small amount of steam coming from under my XJ by the spot where the cab turns into the fire wall. Later on when I got home steam then again came out but this time from under the hood. I looked under neath and there was anti freeze drop.

Yesterday I did a tremendous radiator flush, my dad told me I shouldnt send mad pressure into the heater core. Put it back together and theres a leak still underneath, it seems likes its either by the trans or by the heater core. its antifreeze definitely..

any ideas on whats wrong?

in the winter I did my first radiator flush https://thejeepbank.com/2021/01/30/radiator-flush/

Ralph77

Well you did not say you did this so I am going to throw it out there.
Did you recheck the clamps for the hoses at the heater core?
Simplest things first.

RadiatorExpress

Radiator confirmed to be holding pressure?
Have a black light? May be able to trace source of antifreeze if you shine one in there... fluid will glow.
If you see anything where the plastic meets the aluminum on the radiator, you'll need a new radiator.

robsjeep

if it is the heater core, well for a test, you can remove the two hoses at the heater hose, and with a barbed hose splice, connect the two hoses together. Now the heater is out of the cooling loop. you can now run the jeep, if the leak is now gone, then it probably means you got a bad heater, BUT also be sure that it was not a bad hose connection on the heater.

Hoses oft leak where they are squished by the hose clamp, inspect carefully. I had a tiny hose leak, mistook it for a pump seal leak once.