Hi..all. I have replaced a connecting rod against a failed one (in a 10 piston Benz engine) which is 100 GM lesser than original one since the supplier has modified to Euro norms and old rod no more availble. Now after woking 100 odd hours, the engine failed. After dismantling the engine it was found, the oil pump found failed and metal particles found in the sump. Is it possible that the unequal connecting rods would have generated unbalenced dynamics in the engine and made the crank shaft bearings or con. bearing wear faster or make it fail? Sorry for the common man language!