Posted by Janicholson on August 03, 2013 at 06:51:23 from (74.60.94.18):
In Reply to: cracked block posted by charlespretzer Ks. on August 03, 2013 at 06:27:30:
In simple terms yes. I would get it to bare metal, then use rough silicon carbide cloth 60 grit open coat to assure a "stickable" finish on the metal. I would use a 1/16" thickness layer of epoxy, then put fiberglass mesh on that and embed it so the epoxy fills the mesh with no air bubbles. Then let it harden till the epoxy begins to set and put a final layer on. Use a square of garbage bag plastic as a cover on it so you can smooth it out to the edges from the center. once it is hard (2hrs or so if warm, read the directions) the plastic film will come off easily. Epoxy and metal have a different expansion ratio in heat/cool cycles, so do not assume it is permanent. A metal plate covering the crack and screwed into the block at 3/4" intervals with a neoprene gasket under it is permanent but requires removal of the manifold. Stitching with overlapping tapered thread plugs is great (google metal stitching) Welding is probably the best but will require reconstructing the engine. Jim
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