What are the symptoms of a bent connecting rod in a car?

[DeCarlos]

The symptoms of a bent connecting rod in a car include unstable idle speed accompanied by shaking and vibration after the engine starts, as well as piston misalignment. The following are the causes of a bent connecting rod in a car: 1. Water entering the engine cylinder: Water entering the engine cylinder (combustion chamber) can cause the connecting rod to bend or break. When driving on roads with standing water, the engine may suck water into the cylinder. The water initially entering the cylinder quickly turns into vapor due to the high temperature of the cylinder block, preventing the formation of a combustible mixture in that cylinder. As more water enters, it accumulates on top of the piston, reducing the effective volume of the combustion chamber, increasing compression resistance, and raising the pressure transmitted from the piston to the connecting rod. 2. Abnormal engine fuel injection system: An abnormal engine fuel injection system can cause the connecting rod to bend or break. This usually occurs when the fuel injector of a particular cylinder continuously sprays fuel. Symptoms preceding this issue may include difficulty starting, idle shaking, black smoke from the exhaust pipe, and reduced power.