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Thread: 454 LINE BORE ,,,,HELP ZIP

  1. #1
    Senior Member SENIOR BUILDER chevynovaman's Avatar
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    454 LINE BORE ,,,,HELP ZIP

    FRIEND OF MINE IS RUNNING A 454, DROPPED A VALVE AND TOOK OUT ONE PISTON AND ONE CYLINDER, HAD A SLEEVE PUT IN, AND PUT IT BACK TOGETHER.. MADE IT ABOUT 50 MILES AND TORE THE BEARINGS UP, TOOK BACK TO THE MCHINE SHOP AND THEY SAID THE LINE BORE WAS OFF NOW.. ENGINE RAN GREAT BEFORE DROPPED A VALVE, IS IT POSSIBLE FOR THE LINE BORE TO BE OFF NOW... IF SO HOW COULD THE LINE BORE CHANGE.. THANKS
    1968 CAMARO 302 4 SPD IN THE ROUGH
    1957 CHEVY FUEL INJECTED LS1 4L60E BEAUTY
    1962 CHEVY II NOVA 496 LETS RACE

  2. #2
    Senior Member RACING JUNKIE
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    It's very possibly, especially if it was a wet sleeve, where they may have heated the block and froze the sleeve to install it, it could have shifted the main bearing webs of the block.

    JMO

    Zip.

  3. #3
    Senior Member SENIOR BUILDER chevynovaman's Avatar
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    THANKS ALOT ZIP,, OUR MACHINEST IS A STAND UP GUY BUT I NEVER HEARD OF THIS BEFORE AND WANTED A SECOND OPINION,, IT COSTED MY FRIEND 580.00 TO GET IT BACK GOING AND DIDNT GET CHARGED ANY LABOR. RUNS GOOD NOW AND HOLDS GOOD OIL PRESSURE, THANKS
    1968 CAMARO 302 4 SPD IN THE ROUGH
    1957 CHEVY FUEL INJECTED LS1 4L60E BEAUTY
    1962 CHEVY II NOVA 496 LETS RACE


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