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The crankshaft converts the linear motion of the pistons into rotational motion, which ultimately powers the vehicle's drivetrain.

Symptoms include engine vibrations, knocking noises, low oil pressure, and metal shavings in the oil, indicating potential bearing or journal wear.

Crankshafts are usually made from forged or cast steel to withstand the high stresses of engine operation.

Minor damage can sometimes be repaired through machining processes like grinding and polishing. However, significant damage often necessitates replacement to ensure engine reliability.