heres a question for everybody? how do you get rid of blow by?
96' contour SE
TEIN Lowering springs, dual exhaust,
The PCV system vents the pressure from blow-by in the crankcase back into the intake manifold. when you pressurize the intake manifold with boost the air will go backwards through the PCV system until it reaches the crankcase. the PCV valve is supposed to prevent this BUT it does not seal nearly well enough to do so in our application.
when you add boost to the crankcase all the pressure has to go somewhere. that happens to be out the valve cover vent (which really should go through an oil separator and back into the air intake before the turbo).
i took an extra vacuum brake booster check valve (which seals completely) and installed it in the PCV system so that when under boost it would block off the crankcase.
I am curious about what turbo and how much boost you are running though (im sure you have mentioned it before)