View Poll Results: blown 565
poor copression
poor leak down
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blown bbc

Old 06-28-2009, 07:18 PM
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Join Date: Jan 2004
Posts: 5
Default 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
prince is offline  
Old 06-28-2009, 08:34 PM
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Join Date: Jan 2006
Location: La.
Posts: 2,890

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.


zipper06 is offline  

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