I definately, was, but now it seems I have a small high-pressure coolant leak. I do not know where it's coming from. I suspected it's coming from the thermostat housing, but I didn't see, smell or feel anything coming out of there.
#1 - Is there something out there I can put in to the coolant that will help give a telltale?
#2 - I've heard of putting grated ginger into the coolant to plug up the leak. Any opinions on that?

The car uses green coolant.

Same stuff ( plus a few more things ) that is in Bars Leaks Tablets. This can also be gotten at GM dealers. It is factory approved for seepy leaks.

It won't clog heater cores or rads and is stealth once mixed. Be sure to grind it up before adding to rad and then drive right away to keep it from settling.

I found the leak... It's shown in the attached picture, and that is on the back side of the radiator closest the reservoir tank.
Is that something I can fix with epoxy or something? Or have someone spot weld it? The hole seems to be right next to that clip, or clamp, since the fluid shot straight out from it. If it was coming from behind it, I figure it would have spluttered out all over the place, instead of straight out.

It's only leaking when the thermostat is open. I proved it by squeezing the thermostat intake hose to force it open. It started shooting out coolant, then stopped when I let go of the hose.

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