What is the down side of doing this?  Doesn't the aluminium stop leak
stop everything else up too, like bars leak does?

Joel Skousen wrote:

> I have two Vanagons--both have survived without headgasket problems, I
>
> run them with aluminum stop leak constantly to ensure no leak gets
> bad.
> One has 190k and the other has 130k, and still going strong.
>
> Joel Skousen