Hyundai Coupes/Sedans 1994-1998 Repair Guide

PCV Valve


A positive crankcase ventilation (PCV) system is used to prevent pollutants (blow-by gasses) from being released into the atmosphere. The PCV system supplies fresh air to the crankcase through the air cleaner. The fresh air mixes with the gases and is passed through the PCV valve to the intake manifold. the gasses are then reburned in the combustion process. The PCV system should be inspected every 52,000 miles (84,000 km).

For more information on the Positive Crankcase Ventilation (PCV) system, please refer to Driveability & Emissions Controls of this guide.

See Figure 1, 2 and 3

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Fig. Fig. 1: When removing the PCV hose, check it for obstructions by blowing through the hos

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Fig. Fig. 2: Carefully loosen the PCV valve with a wrench and remove it from the rocker cover

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Fig. Fig. 3: When removed, shake the PCV valve. If a rattle is heard, the valve is operational


  1. Disconnect the ventilation hose from the PCV valve.
  3. Remove the valve from the rocker cover.
  5. Thread the new valve into the rocker cover and tighten to 6-9 ft. lbs. (8-12 Nm).
  7. Connect the ventilation hose to the valve.