Honda CRV/Odyssey 1995-2000 Repair Information

PCV Valve

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The Positive Crankcase Ventilation (PCV) valve is part of a system, which is designed to protect the atmosphere from harmful engine blow-by gas vapors. Blow-by gas from the crankcase, as well as fumes from crankcase oil, are diverted into the combustion chamber where they are burned during engine operation. Proper operation of this system is necessary for optimal engine performance, and decreases the amount of harmful vapors released into the atmosphere.

All Honda CRV and Odyssey models are equipped with a Positive Crankcase Ventilation (PCV) system in which blow-by gas is returned to the combustion chamber through the air intake system.

The PCV valve should be checked according to the manufacturer's recommendations on 1995 2.2L Odyssey models every 60,000 miles (96,000 km) or 4 years, whichever occurs first. Although there is not an official manufacturer's recommendation for the remaining model years, checking the PCV valve is a simple task, most professionals would recommend checking the valve during tune-ups. Two consequences of a failed PCV valve are the possibility of an intake vacuum leak which could cause erratic engine running conditions, or the inability of the crankcase to adequately vent combustion blow-by gasses causing potential oil leaks.

INSPECTION



  1. Check the PCV valve, hoses, and seal for leakage. Replace any component found to be leaking.
  2.  
  3. With the engine at operating temperature and idling, carefully pinch the hose between the PCV valve and the air intake system. When the hose is pinched closed, a clicking sound should be heard.
  4.  
  5. If a clicking sound is heard, the valve is operating properly. If no clicking noise is heard, replace the PCV valve mounting grommet and inspect the vacuum hose for a vacuum leak. Replace any part that is found to leak.
  6.  

With the PCV valve removed, a rattling noise should be heard if the valve is shaken vigorously.

  1. Pinch the PCV valve hose again. If a clicking sound is not present, replace the PCV valve.
  2.  

See Figure 1

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Fig. Fig. 1: To check the PCV valve, the engine should be idling and at normal operating temperature. Squeeze the PCV hose shut and listen for a clicking sound

REMOVAL & INSTALLATION



  1. The PCV valve is mounted in a rubber grommet, which is seated in the intake manifold and has a hose connected to it from the crankcase breather chamber.
  2.  
  3. Before removing the valve, thoroughly clean the area surrounding the valve.
  4.  
  5. Remove the valve by carefully lifting the valve away from the sealing grommet and the manifold.
  6.  
  7. Once the valve is removed check for loose, disconnected or deteriorated lines or hoses and replace if necessary. Make sure the hoses are clean and free of debris. Clean them with a safe solvent, if necessary.
  8.  

To install:
  1. To install the PCV valve, coat the mounting grommet with a light coating of engine oil, press the valve into the grommet, and reinstall the vacuum line and clamp.
  2.  

See Figures 2 through 7

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Fig. Fig. 2: To release the PCV valve vacuum hose clamp, squeeze the clamp together with pliers, then slide the clamp back



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Fig. Fig. 3: This vacuum hose was stuck onto the plastic PCV valve spigot, so a cotter key removal tool was used to help release the hose



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Fig. Fig. 4: While spraying the vacuum hose with a suitable penetrating fluid, the cotter key removal tool was carefully inserted and moved around the PCV valve spigot ...



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Fig. Fig. 5: ... now, the vacuum hose is no longer stuck onto the plastic spigot of the PCV valve



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Fig. Fig. 6: Now that the hose has been loosened from the plastic spigot of the PCV valve, the hose can be easily removed from the valve



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Fig. Fig. 7: If necessary, you can use a trim panel removal tool to remove the PCV valve, but remember to protect the valve cover with a soft cloth

 
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