99' Park Avenue 3.8L

Just noticed today a drip coming from my car backing out of the drive way, when I checked it out it was coolant.

While the car is running it seems to be a pretty steady drip, not straight running out but drip, drip, drip. When I turn off the engine the drip stops.

It approx coming from the passenger side of the motor roughly in the middle, around the lower A-arm area.

does any one know what I should look at first. Did some research and it looks like alot of intake manifolds have been replaced, is it this problem???

or could it be a water pump or something.

it has over 200,000 miles on it and never seen a problem like this on it before.

any suggestions