What Is the Crankshaft?
A large and heavy component, the crankshaft serves as a connector between the engine and the transmission system’s gearbox, transforming the energy generated from the combustion process to move the car.
Crankshafts were initially operated by hand but during the 20th century, the motor started to perform this motion. Today, the crankshaft is secured in place to rotate thousands of times per minute within the engine and connects to the cylinders and pistons to balance the engine’s weight and size. The crankshaft moves in time with the camshaft to coordinate engine operations.
Along with these actions, cars now include a sensor that assesses the crankshaft’s speed and position. Data from this sensor travels to the engine control unit, which determines if the crankshaft needs adjustments. Due to the relationship between the crankshaft and engine, a senor that no longer sends a signal or transmits inaccurate information can affect how the car operates.
Issues with the Crankshaft
Crankshafts typically start malfunctioning for two general reasons. Firstly, the engine doesn’t have a sufficient supply of oil, which affects the part’s lubrication, accelerates wear and can lead to failure. Secondly, a greater degree of engine loading or knocking can place strain on the crankshaft and its bearings. Further related to this, an engine that won’t start has a rippling effect on the crankshaft’s operation.
The sensor may provide no or an inaccurate reading due to circuit issues or an overheating engine, causing the part’s covering to melt. Although the car may still drive in these instances, the crankshaft may experience significant damage, eventually leading to engine failure and costly repairs.
- The vehicle doesn’t start consistently or at all
- The car periodically stalls
- Acceleration is inconsistent or slow
- The check engine light comes on
- The car seems to get fewer miles per gallon
- The engine seems to vibrate or shake, which may stem from poor positioning between the crankshaft, cylinders and pistons
Crankshaft Service
On a general level, a crankshaft’s balance may be assessed to examine its performance and make any adjustments. Related parts, including dampeners and flywheels, will also be examined.
A crankshaft can also be rebuilt. After cracks are filled, the part will be analyzed for straightness and performance, with adjustments made based on the car’s make and model.
Should the crankshaft experience major wear and tear, the part will need to be replaced. This service may be done on its own or as part of a greater engine rebuild.
Have you been noticing performance issues that may stem from a worn or damaged crankshaft? Bring your car into DaSilva’s Auto Body for an assessment and repairs. Contact our Naugatuck shop to schedule a time today.
