I was fiddling with my '82 Turbo today and when I was done I took it for a quick spin to see how it was behaving. I got about half a mile and stopped at a stop sign and got a lot of oil smoke out from under the hood. When I got back home I popped the hood and there was a oil coming from the fill cap. It has never leaked before and it was clean 2 days ago. I know this has no flame trap so it can't be that. I took the cap off with the engine running and there is a very slight amount of pressure. I looked through the archives and it seems the suggestions lean toward the "box" on the side of the engine under the manifold being plugged. Could the rubber hose going from the box to the intake plumbing over the top of the valve cover be part of the problem?

The crankcase pressure is supposed to vent to the elbow before the turbo.

The hose becomes very hard and inflexible over time, and tends to leak,

causing a lean running condition (air getting in after the fuel metering plate

) and high crankcase pressure (the area ahead of the turbo is under partial

vacumm at all times)

Sounds like yours is shot. The one on my '84 245T was so bad when I

replaced it that I was surprised to find out that the house was rubber, since

it felt like hard plastic! Ran much better with the new hose...

Bill

'84.5 242Ti

'84 245Ti

What makes you think you don't have a flame trap. Your engine has to have some sort of crankcase breathing system. A plugged one will cause oil to come out the oil fill cap, and just about everywhere else. If does seem unusual that this happen with two days.

Check the intake manifold and follow backwards to find where the breather for the crankscase is located. The B21F engine should have it located on the drivers side of the engine underneath the intake manifold near number two cylinder.