Main Bearing Set 87491621

Image is an example only, BRAND MAY VARY

A main bearing in a car is a crucial component of the engine. It is designed to support and rotate the engine crankshaft, which converts the up-and-down motion of the pistons into rotational motion. The main bearing is installed between the crankshaft and the engine block, providing a durable and low-friction surface for smooth rotation.

The main bearing serves multiple important functions. Firstly, it supports the weight of the crankshaft, ensuring it remains centered and aligned within the engine block. This helps to reduce vibrations and prevent excessive wear on both the crankshaft and the engine block. Secondly, the main bearing provides a smooth and low-friction surface for the crankshaft to rotate on, reducing frictional losses and improving overall engine efficiency. Additionally, it acts as a barrier between the crankshaft and the engine block, helping to absorb and distribute the forces generated by the pistons during the combustion process.