Date: Thu, 6 May 2010 14:04:30 -0500
Reply-To: mcneely4@COX.NET
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dave Mcneely <mcneely4@COX.NET>
Subject: Re: stainless steel coolant pipes
In-Reply-To: <m2k67f8ac6c1005061012r9b9bb955mecedd6157170551a@mail.gmail.com>
Content-Type: text/plain; charset=utf-8
Why not just use a phosphate-free antifreeze as recommended? Both Zerex and Prestone long-life antifreezes are now phosphate-free, as is the original VW stuff if one wants to pay for it. Corrosion problems seem, from all I've read and heard, to be attributed specifically to phosphate in the formulation. VW is certainly not the only multi-metal system on the road, either. DMc
---- Gary Bawden <goldfieldgary@GMAIL.COM> wrote:
> This issue keeps coming up - - why not just install a coolant filter
> as used on commercial and industrial engines, they contain a
> sacrificial anode (magnesium, I think). Can't hurt, might give a
> feeling of reassurance to those who imagine their coolant passages,
> radiators, etc., rotting away mile by mile. :^)
>
> Gary
>
> >
> > Date: Thu, 6 May 2010 06:08:21 -0700
> > From: Don Hanson <dhanson928@GMAIL.COM>
> > Subject: Re: stainless steel coolant pipes
> >
> > On Thu, May 6, 2010 at 4:35 AM, Andrew Grebneff <goose1047@gmail.com> wrote:
> >
> >> On Thu, May 6, 2010 at 11:25 PM, Ken Wilford <kenwilfy@comcast.net> wrote:
> >>
> >> > OK, let's think about this in a logical manner. The original 1.9l
> >> Vanagons
> >> > had plain steel pipes. The piston liners inside the engine are cast
> >> > iron
> >> > with steel studs holding the heads on. Any way you look at it the van
> >> > is
> >> a
> >> > multi-metal soup.
> >> >
> >>
> >> ...hence the head-corrosion problem?
> >>
> >> I guess it doesn't really make any difference which antifreeze you use, so
> >> long as you actually use the stuff.
> >>
> >> --
> >> Regards
> >> Andrew Grebneff
> >>
> >
> > That is exactly why the heads do leak on this era German water-pumper
> > engines.. Heat+ dissimilar metals+a conductive solution to connect it all
> > together=a recipe for corrosion. The 993 Porsche motors have the same
> > problems as a WBX. Change away with your antifreeze/coolant mix...your
> > motor is still attacking itself.still it is probably the best thing to keep
> > the fresh coolant in there.
> >
> > I wonder if anyone has ever experimented with installing sacrificial
> > anodes like are used in the marine world? A couple of small bits of zinc
> > somewhere accessible in the coolant circulation system might mitigate the
> > corrosion problems you WBX owners encounter in the head area?
> >
> > Don Hanson
> >
> > ------------------------------
--
David McNeely
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