As discussed in earlier posts my Tunnel Wedge on my KC 482 has coolant porosity issues. A weld/machining repair was conducted and there was/is still minor coolant leakage into the
oil, although now in small amounts. A block sealant was added and it's seemed to stop 95% of the seeping. I finally got somewhat fed up and called Dove myself this AM. They introduced me to a patented process called "IMPREX". In layman's terms it's "Vacuum Casting Impregnation". The company that owns the process is called Godfrey & Wing Co., out of Ohio. I called them and talked to technical. They were very knowledgeable and helpful too. This is a standard process for aluminum castings. Their tech mentioned that they just received 4,000 aluminum engine blocks from GM for the process application. They have standing contracts with most of the major automotive MFRs. Rather than go into a bunch of technical verbiage I figured I'd just post their web site. Thoughts, points and counter-points would be greatly appreciated. Let me know what you think...
http://www.godfreywing.com/vacuum-casting-impregnation/