2002 Buick 3800

[L.Fite]

I got this LeSabre with a 3800...
Is has a upper intake coolant leak...
I can not see where it is coming from...
Is there any water in the upper intake plenum?
It's plastic with aluminum intake lower half.
I've cleaned and dried the top of the motor and it looks like its running around where the plenum and intake come together...
Puddles up on top of the intake and runs down the head onto the exhaust...
Tried snugging the bolts around the plenum don't seem loose, but there are a couple I can't get to with the tools at hand.
The motor is in the car and not taken apart...
Trying to avoid that.
Only has 46000 on it...
Was moms car and I'm keeping it because it gets 30+ mpg going down the highway...and averages 22...
Much cheaper than the dually for tooling around town...

Any 3800 mechanics out here?