Thats the auto tranny cooler, everything is normal there.

I don't recall the coolant passages related to the intake manifold but if your leaking coolant there it would either end up in the oil, end up on the outside of the engine or get drawn into the compustion chamber and burned. Maybe mrshorty can comment on this. If it is getting into the combustion chamber you might see white, sweet smelling smoke and the spark plugs would look very clean, steam cleaned. Also burning coolant will trash the O2.