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Old 10-04-2014, 05:29 PM   #9
mechanicalman
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Join Date: Jun 2014
Location: Glendale, Arizna
Posts: 1,642
Re: 400 Small Block Problems...

Quote:
Originally Posted by no1udknow View Post
Oh, on another quick note, I have seen this before. .. in a watercraft that took water into one of the cylinders. When the piston came up, it bent the connecting rod slightly ss water does not compress. I couldn't tell what was wrong until I pulled the crank and piston assy. I would think this logic makes more sense if it is only 1. I could see the mistaken rod, but most peeps buy a set of rods, I would think it rare to see 1 being wrong.
I agree, when looking at the color of the piston it would appear it's ran awhile, leading me to believe it spent the first part of it's life without the knock. The fact that it's only one made me think immediately that it had a bent rod. Putting the engine in a hydraulic lock does strange things to a rod, bent, twist, what have you.

Amazing it hasn't done more damage.
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