Coolant leak

A short time ago I posted a thread about leaking coolant on my 96 GT. I've been trying to track it down, and it appears that the coolant is leaking under pressure at the bottom of the upper radiator hose inlet on the intake manifold. I replaced the thermostat previously when I was having the overheating problem and used a new thermostat O-ring when I did so. The Intake Manifold has been replaced previously with the new upgraded Aluminum Coolant passage, so I wondering where I might have gone wrong to cause this leak. Any suggestions? It's not a BAD leak, I'm having to add coolant to the overflow tank about once a week now, but I'm tired of smelling the Antifreeze while driving. Should I use some RTV sealer on the inlet neck to help seal this off or not? It did not have any on there when I replaced the thermostat, so I assumed it was not reuired. Anyone have any thoughts on this?

i'd say that a once a week refil warrents a solution to the problem. have you replaced the hoses?

It isn't a hose that's leaking...it appears to be where the coolant neck attaches to the manifold, but it doesn't leak all the time!