Aren't you glad the air filter housing bolts are common 6x1mm! Please quote us a price for 7x1mm studs with nuts by the piece (I'd like to convert my internal water pipe bolts too). You may also have a market converting valve and timing cover bolts. Am afraid the angle of intake manifold bolts has you clipped. BTW: Are your studs fully threaded, or do they have a stop in the middle? Bill Robertson #5939 >--- In dmcnews@xxxxxxxxxxxxxxx, "PJ Grady" <rob@xxxx> wrote: > After my post on stainless exhaust studs Martin G. sent me an e-mail > explaining his negative view on combining stainless and aluminum. He > suggested a test which involved soaking a head with our s/s stud installed > for a week in a salt water bath for a week to see if any galvanic action > occurred. I did this test for two weeks in heavily salted water and then > removed the head to dry. There was no trace of rust or galvanic action on > the stud and I unthreaded it by hand after the initial turn to loosen it. > The head however showed a heavy salt buildup suggesting a salinity level > approaching the Great Salt Lake! I did put a dab of high temp Anti-seize on > the installed thread, as we've been doing for twenty odd years on the > original studs when replacing them, and am very confident that this reduces > the chance of galvanic action to a minimum. After about 250 exhaust manifold > jobs I'm looking forward to NOT having to replace the studs every time an > exhaust gasket wears out. BTW we've been changing air cleaner mounting bolts > to stainless for over twenty years and have never had one seize (WITHOUT > using Anti-seize}. This is what led me to believe that, in the real world, > stainless studs (hardened of course) are the way to go in solving the rusted > stud syndrome. I firmly believe that mild steel has a much higher degree of > galvanic action than stainless. Our exhaust kits now feature stainless studs > for those of you interested. I have a number of new products that haven't > made it onto our website yet such as these studs. Unfortunately I'm better > at envisioning and making new products than marketing them. Now....let the > nay Sayers begin! > > Robert Grady > > -----Original Message----- > From: tobyp@xxxx [mailto:tobyp@xxxx] > Sent: Thursday, March 25, 2004 5:29 PM > To: dmcnews@xxxxxxxxxxxxxxx > Subject: Re: [DML] Custom Made Gas-Flap door > > Ed - When you put aluminum and stainless steel (or mild steel for > that matter) together in close proximity, and add moisture, you get a > wonderful battery. The aluminum starts to dissipate, leaving a white > powdery corrosion product called aluminum oxide. All European cars > with aluminum skins attached to steel frames require a isolator ply > between the two materials to prevent the body skins from > disappearing. In the aerospace industry, when we put aluminum and > stainless steel together (which happens a lot) we apply two coats of > a chromium-rich epoxy primer to each material, so we have four coats > of paint for protection. We also fay seal the pieces together with a > high-performance sealant so that no moisture can get between the > layers of dissimilar materials, and install all fasteners with > sealant as well. In short, without extensive protection, putting > them together is a bad idea. > > > Toby Peterson VIN 2248 "Winged1" > DeLorean Parts Northwest, LLC > www.delorean-parts.com > > > --- In dmcnews@xxxxxxxxxxxxxxx, "Ed Garbade" <edgarbade@xxxx> wrote: > > > Can anyone give me a definitive answer with respect to dissimilar > metal galvanic corrosion between stainless and aluminum? > > > > Is it a problem or not? > > > > > > To address comments privately to the moderating team, please address: > moderators@xxxx > > For more info on the list, tech articles, cars for sale see www.dmcnews.com > > To search the archives or view files, log in at > http://groups.yahoo.com/group/dmcnews > Yahoo! Groups Links To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/