GM: Electra/Park Avenue/Ninety-Eight 1990-1993

PCV Valve

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Fig. Fig. 1 The pcv valve is located here, under this flat area of the decorative cover



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Fig. Fig. 2 Remove the bolts that fasten the cover plate to the intake manifold



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Fig. Fig. 3 Remove the pcv cover from the intake manifold. Be careful! There is spring tension underneath



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Fig. Fig. 4 View of the spring and pcv valve in its cavity



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Fig. Fig. 5 Remove the spring and pcv valve from its cavity



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Fig. Fig. 6 Clean or replace the valve and spring as required

The pcv valve should be inspected every 30,000 miles (50,000 km) for proper operation. Rough idle and/or oil consumption may result from improper operation or vacuum leak. To maintain proper idle control, the pcv valve restricts the flow when the intake manifold vacuum is high. The system is designed to allow excess blow-by gases to be vented into the intake manifold to be burned, reducing hydrocarbon emissions.

REMOVAL & INSTALLATION



1990 Engines
  1. Pull the pcv valve out of the grommet and disconnect the rubber hose.
  2.  
  3. Inspect the pcv valve, and clean or replace if necessary.
  4.  
  5. Install the pcv valve to the grommet and connect the rubber hose.
  6.  

1991-93 Engines
  1. Remove the decorative cover from around the intake plenum. The pcv valve is located under the flat area of the cover behind the power steering pump.
  2.  
  3. Remove the bolts that fasten the cover plate to the intake manifold. Be careful as you loosen the cover because there is spring tension underneath.
  4.  
  5. Remove the cover from the intake manifold.
  6.  
  7. Remove the spring and pcv valve from its cavity.
  8.  
  9. Clean or replace the valve and spring as required.
  10.  

To install:

  1. Install the valve and spring to the cavity.
  2.  
  3. Replace or reseal the gasket, and install the cover and hold down bolts.
  4.  
  5. Install the decorative cover.
  6.  

 
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