Diesel engine conrod bends...
Discussion
To buckle an I section or to bend a con-rod in the plane of rotation takes an extraordinary force, almost exclusively caused by a hydro-lock in the cylinder, due to excess oil (valve stem seals), fuel (leaky or faulty injector) or coolant (cracked head or blown head gasket). I'd be checking for this.
A bearing problem usually results in massive overheating and subsequent destruction of the bearing. There will be discolouration of the big end of the rod accompanied by heavy knock and eventually the rod is thrown from the crank. A bend will only occur if a movement of the rod is heavily resisted, with a bearing failure the rod moves pretty freely in the bore.
Dave
Dave
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