How do you know if your crank shaft has gone bad?

You can determine if your crankshaft has gone bad by noticing symptoms such as unusual engine noise, vibrations, or knocking sounds coming from the engine. Additionally, if you experience a loss of power, oil leaks, or if the engine fails to start, these could also indicate crankshaft issues. A visual inspection or a mechanic's assessment may reveal signs of damage, wear, or misalignment. Regular maintenance and monitoring engine performance can help identify problems early.