Sweating intake manifold gasket.

Ugh. That’s a bit of sweating. As others have said, use some RTV around the coolant passage perimeter on the gaskets (front and and back). Did you use RTV on the coolant passages on the first install?

Do you also have a vacuum leak (whistling sound) once the engine is warmed up? I had one after installing my intake and had to re install it with new gaskets. I had troubles fitting the intake the original time (lining up the bolts to the threads) so sanded some of the gasket down (side that didn’t have the rubber printing on it). Clearly I sanded down too much which created a small vacuum leak once the engine was hot. I didn’t have coolant leak though.