Will There Be Any Aftereffects If the Engine Connecting Rods Are Replaced?

1 Answers
McSarah
07/29/25 3:19pm
It is best to replace all connecting rods together, because the replaced connecting rods may differ in weight from the original ones. According to technical requirements, the weight tolerance for connecting rods in the same vehicle is generally within a few grams, with diesel engines having a slightly larger tolerance range than gasoline engines. If the weight difference exceeds the vehicle's requirements, the engine may experience vibration issues, which cannot be repaired. Crankshafts are made of ductile iron: The quenching hardness varies depending on the grade, with most hardness levels ranging between HB130 and HB240. The crankshaft receives the force transmitted by the connecting rods and converts it into torque, which is then output through the crankshaft to drive other engine accessories. The crankshaft must have sufficient strength and stiffness: The crankshaft is subjected to the combined effects of centrifugal force from rotating masses, periodically varying gas inertial forces, and reciprocating inertial forces, resulting in bending and torsional loads. Therefore, the crankshaft must have sufficient strength and stiffness, with wear-resistant journal surfaces, uniform operation, and good balance.
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