Coolant leak at quick connect repair tips please

[billschroeder5842]

Hey all I discovered a leak in my coolant system on my 91 with about 85k on the clock.

I drove the car to work today and it was great. I pulled into my garage after work for my obsessive, dust off and quick clean before the car cover went on and I found a puddle of coolant on the floor. SH*T!

I checked it out and it looks like the leak was coming from the "quick connect" fitting for the heater core inlet hose down (way down) on the thermostat housing.

I had the metal fitting (from Jerry's) that threads into the thermostat housing replaced a couple of years ago as the original was heavily corroded. At that time I put in a new plastic quick connect fitting. The hose is original to the car.

So, what do you all think? Is this a "take it apart" and see what happens or is there a common theme to this piece leaking. Also, Id appreciate any tips on the repair, as that part is really a PITA to put a hand on.

Thanks!