View Poll Results: blown 565

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  • poor copression

    2 100.00%
  • poor leak down

    0 0%
Results 1 to 2 of 2

Thread: blown bbc

  1. #1
    Junior Member SHOW GUEST
    Join Date
    Jan 2004

    blown bbc

    need help, have a 565 blown bbc, hurt spark plug on #2 cyl. ex. valve, install new valve, repaired seat,install new head gasket and milled head.,install new rings, piston look ok as well as cyl.wall. ran leakage test. 100 percent leakage on #2 cyl and 40lbs compression . no air was coming thru valves. #4 cyl was 80 percent with 60 lbs compression. block is oring and head has receiver groove. motor runs good [email protected] shows no blowby.other cyl. have 150 lbs compression. any ideas? thanks

  2. #2
    Senior Member RACING JUNKIE
    Join Date
    Jan 2006
    Sounds like you cracked the head or the block between #'s 2&4, i'm asumming you don't run water, but if you do you can do a pressure test with the plugs out and that will tell for sure if one or the other is cracked.



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