Fighting vacuum leak codes. Have changed injectors, valve covers gaskets, set valves, intake manifold gasket, plenum gaskets, changed throttle body gasket, replaced hoses, etc. Can the upper intake manifold be split in half to check for a leak between the haves? I find nothing in any manuals about removing the top from the bottom or a gasket that would be used. Can it be split and use RTV to put back together?
