What is a common sign of wear in a crankshaft?

Surface scoring is a common sign of wear in a crankshaft. Over time, the crankshaft, which plays a critical role in converting linear motion to rotational motion, can experience damage due to factors such as inadequate lubrication, contamination, or excessive operating temperatures. When scoring occurs, it typically manifests as visible scratches or grooves on the surface of the crankshaft. This damage can lead to increased friction and wear, potentially resulting in more extensive engine issues if not addressed.

Understanding surface scoring is crucial because even minor surface imperfections can lead to significant performance issues, including reduced oil pressure, increased operational noise, and eventually engine failure if left unrepaired. Regular inspection of the crankshaft surface can help mechanics identify wear early and take appropriate action to maintain engine integrity.