Originally Posted By cudaman1969
Pretty much every engine up to the early 60s emissions era did not use them. Just had a pipe that turned down from a stand pipe on the valve cover, the old push on covers, vented to air. Either way engine must be vented. A good barometer on how the engine is lasting, no blow by, good, a lot, time for overhaul.


Yes, a good tell tale of engine condition. Remember back then how at red lights the air would fill with blow by from some of the high mileage (over 50,000) cars waiting for green?

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