Re: How to add a PCV Valve to a 1949 Packard
Posted by Leeedy On 2017/9/14 18:46:43
Beginning around 1966, California smog law (apparently this has been forgotten today) required a specially vented oil filler cap (and/or other similar things) which then had a flexible rubber line that ran to the engine's air cleaner. My 1959 Continentals were thusly modified.
On cars with an air pump (factory for some California cars as of 1966) the oil filler cap was not vented and a small PCV valve (or direct fitting) was placed in a valve cover and again connected via rubber hose to the engine air cleaner. Same thing was done to some cars with road draft tubes. Anything vented out of the engine therefore went into the combustion chambers rather than the atmosphere.
I had several Packards that were likewise modified by law in the 1970s in California. I'm sure some must still be out there. Many cars that were old enough, of course were exempt, but some were modified anyway... as was one of my 1956 Packards.
Imagine that smog specs for California cars 1966 to about 1976 ought to be adequate for any PCV valve one should want to add.
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