Pressure is an important aspect of combustion engine operations, allowing for the belts and pulleys of alternators, AC units, and other systems to be driven. While this pressure is crucial for the functionality of systems, it also needs to be safely released to prevent damage or various hazards. For most vehicles, this is done with the use of a vacuum pump. In diesel engines, vacuum pumps will also serve other roles such as powering the brake system and air conditioning unit, furthering their importance. Just like any mechanical part, vacuum pump components are subject to wear and tear over time, leading to the possibility of an eventual breakdown. In this blog, we will discuss some of the most common signs of a faulty or failing vacuum pump, ensuring that you always know when it is time to make a replacement.