The '86 760 Turbo I've been working on is blowing white smoke like a mosquito fogger. I've been working on the vehicle, finally getting it running last week. I drove it back and forth to work all week. It's about 15 miles each way. Friday afternoon I took it for a test drive, going about 50 miles on the interstate. Shortly after getting off the interstate, when stopping for a Stop sign, I noticed there was white smoke behind the wagon. After going another 7 miles or so, it was really smoking. In fact, the local police told me I couldn't drive on the streets with is smoking like it was.
At a local garage we found the exhaust to turbo discharge connection was loose. The back side of the turbo was covered with oil coming out of the exhaust. After tightening the exhaust header clamp, I was able to slip out of town and get the vehicle home.
Once home I disconnected the turbo to intercooler line. There was oil in this hose also. With oil coming out of both sides of the turbo, I began to think that the oil return line to the sump might be blocked. After removing this line I didn't find it blocked. It did have some build-up on the walls, but the line itself was not restricted.
The impeller does have some lateral movement but very little end-to-end movement. The impeller can be rotated by my finger through the discharge opening. It doesn't "spin" like flicking a pin-wheel, but it does rotate without any feeling of resistance.
Any thoughts?...information?...suggestions?
Ron