Leaking intake gasket.

Aaron, there has been a few problems with head gaskets, the bigger problem was with the intake manifold gaskets.
Check the attached links,
" I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

Intake Manifold Gaskets May Leak Coolant or Engine Oil Buick Century...

Coolant Leaking From Intake Gaskets GM 3 1L 3 4L

Thread how do tell if my headgasket or intake gasket is bad

1997 Buick Century Blown Head Gasket

Not all radiators have them, just remove the lower radiator hose and spray hot water through it from the top till it comes out clear, usually works better anyhow... Note: if your coolant is nasty and all brown and gummed up its cause you have a leaking intake gasket and oil is mixing with your coolant,, if this is the case you may have to replace the radiator as well as the gasket on the intake..

Found this info, it says 88 inch pounds. Hope it helps.

If you have a 3.1L or 3.4L V6 engine, I can guarantee you have either an intake manifold gasket leaking, internally, or the rear head gasket is leaking externally. They are extremely prone to coolant leaks for both. Get it checked out soon, the head gasket job can cost upwards of $1000.00. The intake leak is half of that if caught in time.

Carefully check all hoses & clamps. If leak/seepage not found then check for leak along the intake manifold - the manifold gasket could be leaking and this is quite common.

If the white smoke comes out for 15 to 30 seconds your engine is ok. Condensation does build up inside the engine and as well as the exhaust and will burn out in that amount of time. If the white smoke is continuely extracted from the exhaust pipe you do have coolant leaking through the head gasket

it could be a loos hose clip or the water pump, there is a gasket behind the water pump this could be leaking as well there is a quick fix you could try if its a clip or gasket leaking it should stop the leak,but it wont stop a water pump leaking ,,,,,,,,,,,
get some "rad seal" and tip it into the rad,,,not the header tank it go's right into the rad then top it up with water and run up the engine itll its hot after a short time the leak should stop,,fords put it in all there new cars and vans that come out there fatctorise,, so if its good for them to use it,, it must work?

If the thermostat housing is leaking it could be a bad gasket, a cracked thermostat housing, or a crack in the intake manifold where its bolted on. Cheapest and easiest option would be to get a new gasket and a thin layer of blue permatex.

Check your heater hoses. It sounds like your leak is a hose.

spray carb cleaner around gasket. detect change in idle. if no change it is not leaking. also listen for hi pitched squeal at idle that decreases with accelaration