radiator fluid leaking

[Jfob]

on my '93 240sx hatch...

i see a chunk of radiator fluid on the bolt which attaches to intake...connecting fat rubber tube from radiator to intake? engine sidea bolt is on the inlet for radiator fluid to the intake?... i can post the pic laterthere are something written right by the bolt, didnt have time to read cuz im at work...

and fluid chunk is on the bolt.. so i guess its leaking from that bolti have no idea what kind of seal goes on or bolt itself is bad...or head gasket is perhaps bad? so please advise what i need to do to fix this leakage