VINTAGE SHOTS FROM DAYS GONE BY! (Part 2)

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I remember the first retro smog control requirement in SoCal was to plug the breather tube, Install a PCV valve in the valve cover with an attached hose to the air cleaner. I think I remember that right.
Anyway plugging the breather tube ended the majority of the oil drips in driveways and parking spaces.

 

An assembly line at a General Motors plant in Euclid, Ohio, in 1950 (AP)

 

It isn't done like that anymore.
Source: NFB/Getty Images

 

Judge Tom Lee’s dad, R. J. (Dick) Lee running the wireline checking the bottom hole pressure on a well.

 

And the noticable black stripes on concrete roads, especially on hills, from the road draft tubes...