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 |
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