This is from a 1989 3.0 V6 4x4. I had a remanufactured engine installed in July of '08 (new block and everything, but my old top end) and every since the truck has been leaking oil at the rate of a quart every 400 miles. It looked like the oil was dripping down onto the oil filter area. While messing around I took off the intake hose that connects to the throttle body. I opened up the throttle and when the flap opened oil came oozing out. I thought maybe the pcv valve was stopped up so I replaced the valve along with the grommet and hose. I checked it after a week and oil still oozes out. Quite a bit, actually. Does anyone have an idea as to what is causing this?