What are the signs of a bad engine crankshaft?

[Rich]

Engine crankshaft failure symptoms include: no high-voltage spark, no fuel injection, failure to start the vehicle, and illumination of the engine warning light on the dashboard. The function of the engine crankshaft: It receives force transmitted from the connecting rod and converts it into torque, which is then output through the crankshaft to drive other engine accessories. The crankshaft is subjected to centrifugal force from rotating masses, periodically varying gas inertia forces, and reciprocating inertia forces, causing it to bear bending and torsional loads. The engine's function is: to convert the thermal energy of gasoline or diesel into mechanical energy by burning the fuel in a sealed cylinder, causing gas expansion that pushes the piston to perform work.

[ReaganAnn]

With decades of experience in auto repair, I can tell you the symptoms of a damaged engine crankshaft are particularly noticeable, and car owners can easily sense them. The most common sign is a distinct 'knocking' or 'clunking' sound, especially noticeable during acceleration or idling—it's like someone's hammering inside the engine. Another key indicator is a sudden increase in engine vibration, making the steering wheel shake and the car feel unstable, even causing the seats to tremble. In terms of performance, the vehicle becomes 'sluggish'; pressing the gas pedal results in slow acceleration, making overtaking difficult. Sometimes, the oil pressure warning light may illuminate because crankshaft damage affects the lubrication system, leading to abnormal oil pressure. I've seen many customers ignore these signs, only to end up with a broken crankshaft and a totaled engine, costing thousands to repair. My advice: don't delay if you notice these symptoms—visit a professional shop immediately for a stethoscope check on bearing clearance. Don't wait for major damage. Regular oil changes and maintenance can prevent wear and tear.

[ElisaLynn]

Last year I experienced a similar issue while driving. First, I heard a 'ticking' sound from the engine, like metal knocking, and the car vibrated severely at high speeds, even making the dashboard shake. The power dropped noticeably, and even flooring the accelerator couldn't pick up speed—it felt completely sluggish. Then suddenly, the oil warning light flickered, which scared me into pulling over to check. The mechanic said it might be worn crankshaft bearings and warned that not fixing it promptly could cause the engine to seize. I've learned my lesson now—whenever there's unusual noise or vibration, I stop to analyze it instead of pushing through. I also pay more attention to changes in the engine sound and maintain the oil system regularly to extend its lifespan. This saves a lot of trouble and money.

[VanLeilani]

Engine crankshaft failure signals are extremely dangerous. If you hear persistent knocking sounds, experience severe engine vibrations, or sudden loss of power, immediately pull over and stop driving. This may cause sudden engine stalling, especially dangerous at high speeds or when climbing hills, potentially leading to accidents. I emphasize safety first - at the first sign of trouble, pull over and seek professional inspection. Never take risks. Regular maintenance helps minimize such risks.