Hi all---I have the problem of excesss crankcase pressure on my 1994 850 turbo(as evidenced by the dipstick test). I purchased a new flame trap kit from FCP Groton and I am in the process of installing it. A similar kit was installed earlier, evidently. The there are two connections near the turbo inlet, one for a large line and one for a smaller line. The setup as currently installed has the large line connected to the oil separator box. A second line runs from the connection at the turbo inlet through a metal tube bolted to the top of the engine and then to a vacuum tree on the intake manifold. A third vacuum line that is in the same insulated housing as the large line is not connected at either end.

What is the correct routing? Is the current installation correct? Should the second smaller line in the insulated housing in the new kit be connected to something on my system? Is it a replacement for the current/original routing through the metal tubing on top of the engine?

I realize that the flame trap system has been discussed in length on this board, so if someone could point me to a previous discussion with an answer that would be great.