<snip>
> Something causes vanagon heads to corrode, causing pits and the resulting
leaks which make otherwise decent vans dirt cheap. The cause could be
anything, but spending a couple dollars extra for coolant which matches VW
specs is cheap insurance for me.
>
> This topic comes up again and again and I haven't read a definative reason
heads leak. Until I do, I'll follow the directions the manual gives me. Why
not?
>
> john
<snip>

Well, we all have opinions .... and .... IMHO one of the causes of excess
pitting is poor/inadequate  grounds.  Replacing ground straps and running
additional grounds can't be too bad a thing.

Mike