The idea of backing up the epoxy is excellent. Let me suggest something that I've used before that works very well for a 'pressure patch'. I've used it both on oil and on radiators:
Mix up the epoxy, very well, and prepare the case much as suggested. Then, mix a strong, absorbent fiber into the epoxy, much like fiber reinforced cement. The resulting mixture should be completely wetted by the epoxy, with some epoxy left over, but about half fiber by volume. It sounds crazy, the the best fiber for this application that I have found is to take a cheap tampon (yes, the ones ladies use-a new one, of course!) and shred the fiber out of it. It is super-absorbent and will soak up the liquid epoxy, then provide a strong reiforcement as it sets up. Some patches I've made this way have lasted for years with pressure applied. YMMV-- HTH!! glenh :<) Sharkey's Garage wrote: > While this method might work in the above instances because the epoxy is > sandwiched between metal and the head gasket itself, it's only purpose is as > a gap filler. Your application would require that the epoxy hold back oil > that is constantly under varying pressure. Naturally it would be better to > try and make the repair from the "inside" so that the pressure forces the > repair material "into" the crack, but you appear to have no choice but to > try and repair it from the "outside". > > I suppose if you could somehow "back up" the repair with something else that > is bolted or screwed to the case surrounding the crack, the repair material > would act more like a gasket. That way, the pressure would be partially > taken up by whatever was backing up the epoxy. _______________________________________________ vintagvw site list [email protected] http://lists.sjsu.edu/mailman/listinfo/vintagvw
