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Old 10-05-2014, 11:12 AM   #14
Marv D
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Join Date: May 2008
Location: hells training ground (aka Ariz)
Posts: 3,118
Re: 400 Small Block Problems...

Quote:
Originally Posted by 78maliburat View Post
Stacked a bearing
That was my first thought too,,, but the end result is,,, this thing is probably now a very large heavy paperweight. The production 400 blocks are thin wall castings to begin with,, pound the crap out of a bore like has obviously happened here (hammering the piston sideways at the bottom of the bore) and you have cylinder wall damage beyond what will clean up at +.040,,, which is really beyond serviceable in a 400,,, not to mention the rod is junk, you probably have a cracked crank, and as mentioned this all may have stemmed from a block with a cracked main web.

End of this story is,,, take it apart, take the block and crank to a COMPETANT machinist,, have it checked out.... and then check on the price of scrap iron.

I surely hope I'm wrong, but only one avenue to go down here....
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