What Are the Causes of Automotive Engine Connecting Rod Fracture?

[Julianna]

There are three main causes of engine connecting rod fracture. Below is a detailed explanation of these three causes: 1. Engine cylinder water ingress: When a vehicle is driven on roads with accumulated water, the engine may draw water into the cylinders. The initial water entering the cylinder quickly forms water vapor due to the high temperature of the cylinder block, preventing the formation of a combustible air-fuel mixture in that cylinder. When the water accumulation reaches a certain level, the compression stroke essentially becomes the compression of water, causing the pressure on the connecting rod to increase drastically, leading to bending deformation and eventual fracture, and even breaking the engine block. 2. Abnormal engine fuel injection system: This condition is usually caused by continuous fuel injection from one of the engine's injectors. Symptoms often include difficulty starting, rough idling, black smoke from the exhaust pipe, and reduced power. 3. Connecting rod seizing with the crankshaft: This is generally caused by poor engine lubrication and can be diagnosed by checking the wear condition of internal engine components.