I’m setting up the exact PCV on my ‘59 235 and the direction of flow should be from the crankcase to the intake manifold. The valve should operate in the direction of flow and close if flow reverses. Fresh air is from either the vented oil fill cap on the valve cover or a vent line from the air cleaner to the valve cover.
Phil Moderator, The Engine Shop, Interiors and Project Journals
1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes Project Journals Stovebolt Gallery Forum
