Dodge Aspen/Volare 1976-1980 Repair Guide

Positive Crankcase Ventilation



The positive crankcase ventilation system routes crankcase vapors to the carburetor to be burned with the air/fuel mixture. A clogged PCV system will cause poor idle and rough running. It can also create oil leaks due to increased crankcase pressure. So it pays to keep the system clear and free flowing. Once a year or every 15,000 miles (sooner if the car is only used for short trips) the system should be tested. The PCV valve should be replaced every 30,000 miles.


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Fig. Fig. 1 The PCV valve is located on the rocker cover. To replace it ...

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Fig. Fig. 2 ... first remove it from the rocker cover grommet ...

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Fig. Fig. 3 ... then, with a slight twisting motion, pull it free of the hose

Be sure that you purchase the correct valve for your car. Different engines have different rates of PCV valve flow.

  1. Locate the PCV valve in the rubber grommet in the rocker arm cover.
  3. Pull the valve free from the rocker cover.
  5. Pull the valve out of the rubber hose connected to the other end.
  7. Insert the replacement valve into the hose and then push the other end into the rubber grommet on the rocker cover.