7 Warning Signs of a Failing Crankshaft You Should Never Ignore

---> What is a Crankshaft?

The crankshaft is a crucial component in an internal combustion engine. It converts the linear motion of the pistons into rotational motion, which ultimately powers the wheels of the vehicle. The crankshaft is connected to the pistons via connecting rods, and it rotates inside the engine block, supported by main bearings. It plays a critical role in engine performance and efficiency.

---> Symptoms of a Bad Crankshaft or Crankshaft Position Sensor:

A failing crankshaft or crankshaft position sensor can cause various engine issues, including:

1. Check Engine Light:

◉ The ECU (Engine Control Unit) monitors the crankshaft's position and speed.

◉ If the crankshaft position sensor is damaged or the rotation is irregular, the Check Engine Light (CEL) may turn on.

◉ A diagnostic scan (OBD-II) can reveal error codes related to the crankshaft.

2. Reduced Gas Mileage:

◉ If the crankshaft position sensor malfunctions, the engine’s timing and fuel injection may be thrown off.

◉ This leads to poor combustion, resulting in lower fuel efficiency.

3. Engine Stalling:

◉ A faulty crankshaft or position sensor can cause the ECU to lose track of the engine’s rotation.

◉ This may lead to random engine stalls while driving or idling.

◉ In severe cases, the engine might not restart at all.

4. Engine Vibration:

◉ A damaged or unbalanced crankshaft can cause excessive vibration.

◉ Worn-out bearings or misalignment can worsen the shaking.

5. Engine Misfire:

◉ The crankshaft position sensor helps with ignition timing and fuel injection.

◉ If it fails, the engine may misfire due to incorrect fuel-air mixture and spark timing.

◉ Misfires can cause rough idling, loss of power, and potential engine damage.

6. Poor Acceleration:

◉ If the ECU cannot accurately read crankshaft data, it may affect the air-fuel ratio and ignition timing.

◉ This results in sluggish acceleration and poor throttle response.

7. Low Oil Pressure:

◉ A worn-out crankshaft, especially with worn bearings, can cause oil pressure to drop.

◉ Low oil pressure can lead to poor lubrication, increased friction, and possible engine failure.

---> Conclusion:

A faulty crankshaft or crankshaft position sensor can cause serious engine issues. If you notice these symptoms, it’s best to get a diagnostic scan and inspect the crankshaft, bearings, and sensor. Early detection can prevent costly repairs and engine failure.