I used 2 cans of the stuff walmart sells yesterday and left it overnight, no more boiling over or overheating, in fact I took it this morning and had an emissions test done, passed (they do them on a dyno type thing here)

 

nice, what was the stuff called?

 

I had an internal leak.
I had good luck with the BarsLeak brown powder stuff.
Add half - Idle till hot - cool down (cold) - add other half - idle till hot - cool down.
Drive like crazy for months.

 

looks like I spoke too soon, she's back to foaming at the mouth again

 

The Bars is for Radiator leaks. Since this is an internal leak, you need the bottle that has copper in it that is for Block Weld. You need 2 of those.

I have done this once last year and the car still runs great. The combustion is starting to leak into the cooling system again. I may have to do it one time this year.

Here is the link to some instructions.

Good Luck and dont give up too quickly.