In my past experience, only one type sealant works well on this sort of
leak. This is a small vial of tiny aluminum flakes, kind of 'powdery', which
is poured directly into the cooling system while running and circulating. I
ran one of my former Westies (with the exact same crack you describe!)
across the US twice with the product in the cooling system, very little
coolant loss. Good luck!

Karl Mullendore
Westy Ventures
1987 Syncro Westfalia 1.9TD

----- Original Message -----

> Is there some kind of additive I can put in my coolant to "seal" up the
> crack for a couple months?  At least to eek me through the winter?  I'd
love
> to be able to buy some time without doing more damage than is already
done.
>
> Brad