You might have leaks appear, or might not. If so, they're more likely to come from places like fitting joints & circulator pump gasket surfaces. Not sure about 'sections'? Most boilers are all one piece - might depend on what you've got for a boiler & how old it is too. Mine would weep from some fittings & circ pump flanges. Only one way to find out - that's turn it off for a while & let it cool down & see what happens.