Originally Posted by Volfandt
Originally Posted by 52Carl
What is the source of the 'pressurized air' in the crankcase of your engine, Dave?
Blowby and the downward stroke of the piston(s).
My confusion comes from the fact that on my 216 there are multiple vents in the valve cover that do not have any pressurized air being forced out of them. If there was pressure in the crankcase, wouldn't it travel up through oil drain-back holes in the head and blow out all over the engine compartment via the valve cover vents?

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission