1 Transmits engine power – Delivers the engine’s power to the flywheel and transmission.
2 Supports connecting rods – Provides journals where the connecting rods attach and rotate smoothly.
3 Maintains engine balance – Counterweights help reduce engine vibration and ensure smooth operation. Etc
WHY IT MUST REPLACED:
The crankshaft is a critical engine component that converts piston movement into rotational power, transmits engine torque, supports smooth engine operation, and drives essential engine systems. It should be replaced if it is cracked, bent, excessively worn, or otherwise damaged beyond repair.