What is a common effect of worn bearings in an engine?

Worn bearings in an engine commonly lead to low engine oil pressure. Bearings, which are crucial for reducing friction and supporting the moving parts of the engine, rely on a film of oil to maintain proper function. When bearings wear down, the clearances within the engine increase, allowing oil to flow less effectively and leading to a drop in oil pressure. Low oil pressure can cause insufficient lubrication, potentially resulting in severe engine damage over time. Maintaining proper oil pressure is essential for the health of the engine, and the effects of worn bearings are directly linked to this critical aspect.

Improved cooling, better throttle response, and increased fuel efficiency are not typical outcomes of worn bearings. In fact, these may be negatively impacted due to the increased friction and wear caused by inadequate lubrication stemming from low oil pressure. Worn bearings compromise the engine's overall performance, rather than enhancing it in any capacity.