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Thread: Pressure in motor - knocks when I shut it off
          
   
   

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  1. #1
    Simi Mike's Avatar
    Simi Mike is offline CHR Member Visit my Photo Gallery
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    Sep 2011
    Location
    simi valley
    Car Year, Make, Model: 32 deuce
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    67

    Pressure in motor - knocks when I shut it off

     



    As this happened to anyone? My motor makes this wierd knock
    after I shut off the motor, it does it for 15 - 30 sec after the motor
    has been shut off. I have a small block chevy, with breathers on
    both valve covers. One goes back to the base of the carb.
    It doesn't do it all the time, but 50% of the time, when I shut off
    the motor, and a few times while ideling at a light, you can hear
    this knock? Any ideas? Obviously, nothing is turning or moving
    when I shut it off, so I just assume its pressure in the motor that
    eventually goes away. - - -If it is pressure in the motor, how can
    I relieve it, so it doesn't knock anymore?
    Thanks
    Last edited by Simi Mike; 04-17-2012 at 12:48 PM.

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