Well, don't argue with me, I'm not a professor! The guy who laid it out on the Subaruvanagon list made a convincing case for the coolant being an electrical conduit. Electrons are pulled from the aluminium by the copper through the coolant. I'm pretty sure the low coolant level sensor uses the water as a conductor. On 6/29/06, Alistair Bell <albell@uvic.ca> wrote: > > Jake, > > in circuits and electrolysis one needs a return path. > > isolate dissimilar metals with non conductor, its not a new idea. > > Alistair > > > > > On 29-Jun-06, at 5:21 PM, Jake de Villiers wrote: > > Larry, the water is connecting your aluminum motor and your copper pipe! > > On 6/29/06, Larry Alofs <lalofs@rcn.com> wrote: > > > > This problem can be avoided if the copper makes no electrical > > connection > > with the aluminum thru the body etc. Whether that is practical is > > left > > as an exercise for the student. > > > > Larry A. > > > > > > Jake de Villiers wrote: > > > > > I'll repeat; > > > > > > "Over in SubaruVanagon Land there was a very interesting > > discussion on > > > the > > > electrical properties of various metals, the upshot of which was > > that > > > copper > > > would degrade the aluminum of the engine through electrolysis, > > whereas > > > galvanised steel electrical conduit (1-1/4 " dia) would be fairly > > > neutral. > > > There was at least one owner who had replaced both of the long tubes > > with > > > the stuff. " > > > > > > Copper's pulls electrons from the water-contact parts of your > > engine, > > > making the head seals leak sooner. > > > > > > You can find several learned dissertations in the Archives at the > > > subaruvanagon yahoo group site. > > > > > > Jake > > > > > > On 6/29/06, don spence <dkspence@telus.net> wrote: > > > > > >> > > >> So.. why not Copper? Available, cheap, sorta bendable, fittings > > >> available. easy to cut to length. > > >> > > >> Inquiring minds..... > > >> > > >> > > >> On 28-Jun-06, at 9:01 PM, Automatic digest processor wrote: > > >> > > >> > > > >> > Date: Wed, 28 Jun 2006 18:29:41 -0700 > > >> > From: Alistair Bell <albell@UVIC.CA> > > >> > Subject: Re: Coolant pipes replacement > > >> > > > >> > Actually silver is a better heat conductor than gold, but suffers > > >> > from oxidation problems :) > > >> > > > >> > I do want some silver core pots and pans, or straight silver > > to make > > >> > caramel. > > >> > > > >> > But settling for copper and stainless. Which begs the question > > why > > >> > not copper pipes running up front? Corrosion wouldn't be too bad > > >> > inside and if thick walled enough the outside should last just as > > >> > long as the nice old gutters on buildings (unless one runs the > > van > > >> > through H2SO4 habitually). Of course we isolate stray electric > > >> > currents with silicon or rubber tubing at each end. > > >> > > > >> > Alistair > > >> > > > >> > > > > > > > > > > > > -- > > > Jake > > > 1984 Vanagon GL > > > 1986 Westy Weekender "Dixie" > > > www.crescentbeachguitar.com > > > > > > > > > > -- > Jake > 1984 Vanagon GL > 1986 Westy Weekender "Dixie" > www.crescentbeachguitar.com > >
-- Jake 1984 Vanagon GL 1986 Westy Weekender "Dixie" www.crescentbeachguitar.com |
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