[s-cars] A4 head rebuild, Part 3

[Kirby Smith]

Last I tried to get any, Permatex was available in 1 gal, 5 gal (with
strainer), and larger drums.  I used the 5 gal size when I did my
Corvair engine.  After a year or so, the water-oil-acid-whatever
interface ate perforations through the steel container near the top and
I had to get rid of it.

kirby

Igor Kessel wrote:
>
> Kirby Smith wrote:
> >
> > One note: The proper way of cleaning Al heads is not with a base, but
> > with Permatex Cold Parts cleaner: the active ingredient of which is
> > chrysilic [Bob - help me with the spelling here] acid.  This acid has
> > the property of eating carbon compounds, and has little effect on metal,
> > so long as the metal is fully covered with it.  Otherwise, there is some
> > staining at the acid/oil interface.
>
> Kirby,
> I never heard about that acid. That's very interesting.
>
> BTW, if I had a standard parts cleaner with a closed cycle, even the
> smll one, the life would be much easier. I will eventuall get one, but
> for the time being I have to resort to this stone age technique.
>
> --
> Igor Kessel
> two turbo quattros