Date: Fri, 7 May 2010 00:32:55 -0400
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: stainless steel coolant pipes
In-Reply-To: <20100506102212.ZDLJ8.272311.imail@eastrmwml41>
Content-Type: text/plain; charset="utf-8"
Hoses of excessive length expand under pressure. The added expansion can interfere with pressurizing the system and quickly getting vacuum during cool down to suck make up coolant from the capture tank.
BTDT
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Dave Mcneely
Sent: Thursday, May 06, 2010 10:22 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: stainless steel coolant pipes
But, others have said they use coolant hoses to replace the pipes. I assume this requires some simple engineering to keep the hoses from sagging, but they seem much cheaper to buy, should convey the fluid with the same efficiency, and are engineered for the purpose of carrying hot coolant. Is there a real reason not to use them? Thanks, DMc
---- Don Hanson <dhanson928@GMAIL.COM> wrote:
> 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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