How to Check Brake Fluid?
2 Answers
Brake fluid can be seen on the exterior of the reservoir, which has markings. If the brake fluid is low, the brake warning light on the dashboard will illuminate. Methods for selecting brake fluid: 1. High-temperature performance, which refers to the fluid's ability to resist vapor lock at high temperatures, is evaluated using the equilibrium reflux boiling point; 2. Low-temperature performance, which refers to the fluid's flow characteristics in cold conditions, is assessed by its kinematic viscosity at -40°C; 3. Since the seals in the braking system are made of rubber, prolonged exposure to brake fluid can cause chemical reactions, leading to swelling or shrinkage of the rubber seals and affecting braking performance. Therefore, it is important to choose brake fluid that is compatible with rubber.
My friends and I often work on cars together, and checking brake fluid is a basic task. Open the front hood and locate the plastic reservoir labeled 'Brake Fluid,' which is positioned on the side or center of the engine bay. The transparent reservoir has MIN and MAX level marks—the normal fluid level should be in the middle or slightly above. If it's low, it indicates a leak or worn brake pads, and you'll need to top it up with the same type of fluid, such as DOT4. Also, check the color: clear and transparent is best. If it turns dark brown or becomes cloudy, it means the fluid has absorbed too much moisture and degraded, which can lead to soft brakes or failure. Remember, replacing the fluid every two years is the safest practice—after all, safety is no small matter.
