What Caused The Engine Connecting Rod To Break?

An abnormality in the engine's fuel injection system caused a certain cylinder to continuously inject fuel, making it difficult for the car to start, vibrating at idle, reducing power, and emitting black smoke.

The locking of the connecting rod and crankshaft is often caused by poor engine lubrication, and it is necessary to check the internal wear of the engine.

The vehicle is speeding, the connecting rod breaks at its weakest point, and the piston stops near top dead center.

The tightening torque during installation is too large, exceeding the material strength and causing cracks.

The connecting rod itself has quality problems and requires material chemical composition analysis or hardness testing.

Fatigue fracture, such as oil entering the combustion chamber after a vehicle overturns, causing an increase in pressure at the top of the piston, bending and deformation of the connecting rod, and fracture after prolonged driving.

Damage to the crankcase system, such as a ruptured ventilation valve, can cause oil to be sucked into the combustion chamber, causing the connecting rod to break.

Poor engine lubrication, such as lack of oil or unclean oil, can cause the large end of the connecting rod to break and have metal scratches.

Improper operation, such as not removing the cleaning solution completely when cleaning carbon deposits, can cause engine cylinder jacking and connecting rod breakage.

When the engine cylinder is flooded, if driving on a waterlogged road, the water is sucked into the cylinder, and the pressure on the connecting rod increases, causing it to bend and deform until it fractures.