604 help

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  • 21dirt4life
    Junior Member
    • Jun 2008
    • 5

    #1

    604 help

    Having trouble with #5 cyl. not getting hot as the rest of the cyl. have changed plugs,dist,wires,carb,msd.Anyone else had this problem?The cyl.is about 200 deg.cooler but it is firing.
  • brad hibbard
    Senior Member
    • Oct 2007
    • 974

    #2
    Do a leak down it should tell you the story

    may have broken a locating shim----lost spring pressure-----

    I have seen springs wear clear into the intake runner on that cylinder

    Brad
    Race-1 offers competitive pricing on Chevrolet Performance 602, 604 & 525 sealed circle track racing engines. Race-1 specializes in the GM CTC engines and we offer a wide variety of services specific to the 602 & 604 crate engines. Your source for Stealth Racing Carburetors! Learn from Brad's expertise in teaching, too!

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