i really cant find any problem with it iv perfromed a sniff test i run uv dye in the anti freeze, so no head gasket issues, im sure i dont have a porous block all the plugs come out looking good n normal i didnt have a problem until i changed the top rad hose and T peice and drop hose its a **** part one and leaked almost instantly from the clips, clip replaced with decent types going to fit mikalor shortly to all hose and refit the original hoses with the metal T peice i previously fitted and fit a new stat that iv drilled a 3 mm hole into which aids cooling so they say and helps with the normal air locks these suffer
other than that all seems well the radseal has sealed it up no more leaks and holding water if the worse was to happen at least id fine the problem if it even exists