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copper based neverseize. "....the whole world , Chico. And everything in it." David V. Nelson 1969 Fastback FI (no matter what!) ----- Original Message ----- From: "Jim Adney" <jadney@vwtype3.org> To: <type3@vwtype3.org> Sent: Monday, December 22, 2003 11:38 PM Subject: Re: Details on First Motor (was [T3] Photos of the oil cooler rework) > On 23 Dec 2003 at 1:02, Neil Verdon wrote: > > > the reason i say use the flat washers as well is over the years all the > > engines ive taken down a lot have shown quite a bit of corrosion in this > > area from steel being in contact with aluminium! > > Yeah, galvanic corrosion eats away the light alloy from under the steel bolt > heads..The flat washers might spread the force out over more area and get some > more support, but the bolt bosses are actually quite thick and I don't think > we're in any danger of them weakening noticably. > > This is a problem for all the steel fasteners against the case and light alloy > parts anywhere. I don't know a good solution for it. Perhaps some Al, Mg, or Zn > washers which would be sacrificial so they could be replaced as they were eaten > away. > > -- > ******************************* > Jim Adney, jadney@vwtype3.org > Madison, Wisconsin, USA > ******************************* > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org > >