There are a couple leak stoppers on the market that work well and won't cause problems.
Not the dry stopleak crap. But it comes in a quart can, and works very well
on slow leaks, even headgasket. An older one was made by DuPont, but there are a
couple more now. They run over $50 dollars. I have seen several vehicles with it,
either bunkers with nothing to lose, or decent vehicles where the owner c ouldnt fix it
right, right now. They ran for years without any more issues.
If you change the coolant, they will start leaking again.
