Posted on 9/26/2025

You might not notice them at first glance, but those rubber hoses under the hood play a vital role in keeping your vehicle running smoothly. They carry engine coolant, vacuum pressure, fuel vapor, and more. Over time, heat, pressure, and age cause them to crack, bulge, or leak. Ignoring them can lead to breakdowns, overheating, and serious engine damage. If a hose gives out while you're driving, your car may lose coolant rapidly or stall without warning. What Do These Hoses Do Under the hood, there are several types of hoses, each serving a specific purpose: Coolant hoses move antifreeze between the radiator and engine Heater hoses carry warm coolant to your cabin heater core Vacuum hoses help control sensors and components like the brake booster Fuel vapor hoses are part of your emissions system Each one is essential for your vehicle’s daily operation. When any of them fail, even a small crack can turn into a big problem. Signs That a Hose Is ... read more