* Loud, metallic knocking or banging: This is the most prominent sign. It's a significantly louder and more violent sound than typical engine noise, and it's often described as a sharp, rhythmic knocking or a deep, metallic clang. It will usually worsen as the engine continues to run.
* Loss of power: The engine will lose significant power, possibly even stalling completely.
* Visible smoke from the exhaust: You might see significant white or bluish-grey smoke billowing from the exhaust pipe. This indicates oil burning in the combustion chamber.
* Engine vibration: Excessive and unusual vibrations throughout the vehicle.
* Oil pressure warning light: The oil pressure light will likely illuminate, often accompanied by the loud knocking. A low oil level *could* be a contributing factor or a result of the rod failure, but the knocking is the key differentiator.
* Immediate and significant damage: Once a rod is thrown, the engine is usually severely damaged and requires a major rebuild or replacement. Continuing to run the engine will only exacerbate the damage.
Crucially: If you hear a loud knocking sound coming from your engine, stop driving immediately. Continuing to drive with a thrown rod will cause irreparable damage and potentially dangerous situations (e.g., loss of steering control). Have the vehicle towed to a mechanic for assessment.
