Hi Phil
we are thinking it is between water jacket and into exhaust ports, have had the head tested and ceramic lined as well as skimmed but still leaks after rebuild so thinking it must be in block somewhere so perhaps a pressure or vacuum test next. doesn't seem to be much else wrong with it as everything else was running fine except leak into exhaust. limited workshop and no specialist equipment but cannot afford to keep rebuilding and installing into vehicle only to find same fault etc.
Gary
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