Congratulations on a good buy. The dilavar studs have been known to break when brand spanking new. Time, heat, corrosion and hydrogen embrittlement (due to the heat cycles) all work against us on this one. IMHO dilavar studs will break, all it take is one to break to have to fix. Guess we should just look at them as a wear item that need replacing at some point. If everything else on the engine is in good shape you should just put new steel studs in and put it back together. If you do it your self you are looking at $130 studs, some gaskets, both needed and some recommended, tools and your time to do it
