Nissan Sentra/Pulsar/NX 1982-1996 Repair Guide

Positive Crankcase Ventilation (PCV) Valve

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REMOVAL & INSTALLATION



See Figures 1, 2, 3 and 4



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Fig. Fig. 1: Cutaway view of a basic PCV system's operation



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Fig. Fig. 2: Remove the hose from the PCV valve



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Fig. Fig. 3: Use the proper size wrench to unscrew it ...



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Fig. Fig. 4: ... then remove the PCV valve from the rocker arm cover

This valve feeds crankcase blow-by gases into the intake manifold to be burned with the normal air/fuel mixture. The PCV valve should be replaced every 24,000 miles (38,647 km). Make sure that all PCV connections are tight. Check that the connecting hoses are clear and not clogged. Replace any brittle or broken hoses.

To replace the valve, which is located in the rocker arm cover:

  1. Squeeze the hose clamp with pliers and remove the hose.
  2.  
  3. Using a wrench, unscrew the PCV valve and remove the valve.
  4.  
  5. Disconnect the ventilation hoses and flush with solvent.
  6.  
  7. Install the new PCV valve, then replace the hoses and clamp.
  8.  

 
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