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By 82warren - 9 Years Ago
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I've taken a lot of motors apart in my days but have never seen a con' rod bent, seen easily with bare eyesight, it was BENT into an easily seen S shape, this was a running engine, the piston and crank none the worse for wear because of this. My only option was to get a reconditioned rod, it came with a new bushing, I had this reamed to fit my pin. Since everything else seemed fine, we'll use the same piston, do a ring job and put it back together. This is a '54 239 EUB, it will replace the engine in my car now. There is no sign of any damage whatever, top of piston is smooth, head is fine. Only thing I can think of would be bad wires or cap, causing incorrect firing or something, who knows, doesn't make sense to me.
warren
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By Bobwanna - 9 Years Ago
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Warren, I am with you on this. The only other thing I can think of is that sometime in the past that particular cylinder had water in it for whatever reason and upon cranking it had a hydraulic lock to stop the piston from moving up and bending the rod. This would NOT leave any visible traces on the piston head. I would dismiss the misfiring issues? This was a running engine and is baffling to me. Hope someone can add to this mystery - Bob
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By Ted - 9 Years Ago
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I have seen connecting rods bent as result of fuel leaking into a cylinder while the engine sits and then the rod compression locks when the engine is attempted to be started. In rare cases, the cylinder wall cracks as a result and in other cases, the engine simply cranks up without the owner knowing anything ever happened until the engine is torn down for other reasons. I did see a 428 Ford with the rod bent enough that it was making a light rattling noise as a result of the rod contacting the lower edge of the cylinder wall. The engine was running fine otherwise.
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By DryLakesRacer - 9 Years Ago
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We drove a 1965 scrubelle with a bent rod for 117,000 miles. We bought the car with 13k on it. I assumed it was hydrauliced on the starting line when new. That cylinder was always 15# less when doing a comp check. Other problems necessated a tear down when it was found. The engine always ran good. Make sure to balance the new rod to the rest of them. Good luck.
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