454 problem
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454 problem

  1. #1
    Junior Member
    Join Date
    Nov 2009
    Posts
    10

    Default 454 problem

    I have a chv 454 in my carra jet boat,it makes a noise at 2800 rpm to 3000 rpm like you put screwdriver in a fan blade.It will onley do this in the water.The motor runs grate the rest of the time. Need help.

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  3. #2
    Senior Member YumaJet's Avatar
    Join Date
    Sep 2008
    Location
    Yuma, Az
    Posts
    827

    Default

    the same thing happened to my 454 and it was a flat cam lobe and a few bent push rods. it would do it above 2500 rpm's and sounded horrible. sounds like its time for a rebuild.
    boatless....

  4. #3
    Senior Member
    Join Date
    Nov 2010
    Posts
    117

    Default odd noise

    Are you sure its not your fly wheel touching anything ? That has happened to me on past jet boats at certain RPMs

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