What does the main bearings do?

Main bearings support the crankshaft in an internal combustion engine, allowing it to rotate smoothly. They reduce friction between the moving parts and help maintain proper alignment, which is crucial for the engine's performance and longevity. By distributing the load and absorbing vibrations, main bearings contribute to the overall efficiency and reliability of the engine. Proper lubrication is essential for their function, as it minimizes wear and prevents overheating.