History of Engines Car engines are a crucial car component. These were introduced & sold in the year 1961. They have a Positive Crankcase Valve(PCV) installed within them and helps reduce engine emissions as per the regulations furnished by the Federal Government. Positive Crankcase Ventilation systems were an excellent replacement for the crankcase venting systems… Continue reading Why There’s Oil Inside my Intake Manifold or Throttle Body?