Coolant leak, not radiator

[cal-x07]

I have an 07 explorer equipped with the 4.6.
Between the right/front shocker tower and right side of the engine, theres a hose that appears to split between the transmission cooler and heater core. The plastic coupling is Y shaped, and has somehow sprung a leak out of the top portion where the upper hose goes in. I attempted to separate the hose from the coupling, however, was unsuccessful. The coupling doesn't appear cracked, but coolant is coming out of the top where the hose connects, maybe a bad O-ring?

Anyone have this problem? Or know a way to fix it without major surgery?

 

[Little_Giant]

Here is an excellent thread about the issue, and how to repair. I haven't had to do it myself, but its probably a matter of time.

http://www.explorerforum.com/forums/showthread.php?t=389906&highlight=coolant

 

[Threnners]

Every time I have coolant and no radiator leak it's the thermostat housing.

 

[cal-x07]

It was the above link, performed the fix, works great.