pcv valve

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  • November 13, 2010 12:58 PM - 919 Views
    REBORN55 Went to put new PCV valve in wife's coupe--77 350 and noticed that the new one vibrates--rattles--not fully sealing with motor running. Old PCV valve sealed tightly when running--no pulsating/rattling. Brand new NAPA valve correct fro the motor. Problems?--or not to worry. Has 19 inches of vacuum at idle. _
     

     
     
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  • Comments
  • amswuod1 Rides Info - union, Kentucky
    November 13, 2010 08:46 PM
    amswuod1

    You may have to replace the grommet in the valve cover to properly match the pcv valve diameter.

    Check the outside diameter of the old valve vs the new one.

    Bob D.

     
  • REBORN55 Rides Info - de soto, Illinois
    November 13, 2010 09:07 PM
    REBORN55

    Valve is very tight in the grommet.  old valve still workd--just doesn't vibrate like the new one

     
  • Italianguy63 Rides Info - bartow, Florida
    November 14, 2010 11:57 AM
    Italianguy63

    That's cause it has gunk in it. 

     
  • REBORN55 Rides Info - de soto, Illinois
    November 14, 2010 01:13 PM
    REBORN55

    Which one---the new one is the one that vibrates.

     
  • Italianguy63 Rides Info - bartow, Florida
    November 14, 2010 01:59 PM
    Italianguy63

    Right.. the old one doesn't vibrate cause it is full of carbon and oil... The new one will stop vibrating soon!

     
  • dixie Rides Info - dade city, Florida
    November 15, 2010 07:37 PM
    dixie

    Mark thats very good.

     
  • REBORN55 Rides Info - de soto, Illinois
    November 15, 2010 08:14 PM
    REBORN55

    New one has been in there for 300 miles or so---old one only had about 1000 miles on it andnew one vibrates bad enough to cause the engine to surge .  Guess it is time for Mr. Clean

     
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