PVC delete
#22
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Member Since: Oct 2019
Location: Deep in the Pisgah National Forest
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The PCV system helps seal the oil rings and is important not just for emissions. The system should use full manifold vacuum through a check valve to vent crankcase gasses from a high spot in the sealed crankcase. Usually the high spot is a valve cover. If you are drawing oil into the system then you can install a catch can.