Thanks for all the ideas about cleaning my blocks interior water jacket. I will try to clean the rust and scale which I can see at the various holes and openings, but I would like to soak the interior water jacket with one of rust and scale removal products discussed hear. Any recommendations on how to plug all the water holes, so that I can let it sit over night before I flush it out? I plan on coating any freshly machined surfaces with grease before I attempt the water jacket cleaning.
