[RallySnake]

There is a product called Blue Devil Sealant. It is expensive ($60) and you have to follow instructions carefully. But, it will fix cooling leaks like this. I used a couple of bottles of anti-rust instead of anti-freeze and my engine developed a head gasket leak that seeped out under two head bolts. I had spent a month rebuilding this engine and did not want to take it apart again, so I tried 1/2 bottle if this stuff. It worked amazingly well. I was so happy not to fight those hard to reach head bolts again!