Well on my 3.0 i used to have a coolant leak behind the motor and it waould lightly steam through the wiper cowl. I was like WTF. It ended up being the hose behind the intake manifold, it comes out and goes right back in the intake trhough the hose. The hase was bad and developed a leak, damned thing almost burned my motor, it was (ill fix it later deal) but thats where mine was leaking from, so it can give you a place to look at.

1989 TOYOTA PICKUP 4"trailmaster, 3" Body Lift 8,000 lb warn winch, q-78 tsl super swampers