Have you ever imagined your car or other vehicles working without a brake system? Definitely not! It is impossible to run your vehicle without a proper brake system. All the modern vehicles possess the power brakes in which the system includes a brake booster and master cylinder.
The brake booster connecting vehicle’s brake pedal and the master cylinder is beneficial to hold back the high fluid pressure through the use of vacuum contained in it. With their use, the driver need not exert extra pressure on the pedal. Do you know how to judge if the brake booster or master cylinder is bad? If not then continue reading below to know more:
What are the usual signs of a faulty brake booster or master cylinder?
- You need to put in more effort to apply brakes because vehicle’s brake pedal has turned hard
- The included brake pedal is unable to resume to its original position on its own
- The engine RPM decreases whenever you release vehicle’s brake pedal at the idle state
How to Tell if the Brake Booster or Master Cylinder is Bad?
Illuminated Brake Warning Light Over the Console
The foremost sign of the brake booster failure is the illuminated brake warning light on the console. It is quite simple to notice the brake warning light illuminating over the dashboard. This gives an idea that there something wrong with the braking system. When the brake warning light illuminates, the present sensors inside the braking system would found out a malfunction.
In most cases, this will denote that the system is low on hydraulic fluid. It is true that the braking system is a sealed system. When you constantly add brake fluid in your vehicle, it implies that the system has a leak and this problem must be resolved as soon as possible.
This illuminating light indicates some fault with the braking system but it does not mean that the brake master cylinder is faulty. However, if the included braking system sensors identify the drop in the brake fluid pressure then it may be because of a faulty brake master cylinder. Therefore, this is the key reason behind the illuminating warning light.
Vehicle Getting Stopped At a Longer Distance
The moment the air bubbles come inside the brake lines through the master cylinder, it will decrease the pressure causing the brake to apply very softly. Such situation instantly demands the examination of the valve. If this is not done, the hitch of a vehicle stopping at a longer distance, after the brake is applied, will persist.
Demands More force Exertion on your Vehicle’s Brake Pedal
Controlling the pressure inside the master cylinder is done by the check valve. If this valve begins creating an issue then it will transform the smooth, soft pedal into the hard brake pedal.
Therefore, whenever you face difficulty to engage your vehicle’s brake pedal, consider inspecting it from the certified mechanic.
Stalling the Engine
During the situation when the diaphragm within the brake booster fails, it will permit the surplus vacuum to penetrate the system from the engine. Consequently, when the brake is applied, the engine stalls. This may later create serious issues. Henceforth, prior to you notice any odds of a brake failure, it is advised to let your vehicle inspected by any nearest trained professional.
The worn-out or damaged brake booster will draw out excess engine vacuum. It is this condition that would choke the motor and create misfires or stalling whenever the brakes are pressed. When you notice this symptom, it suggests that the diaphragm within the brake booster is damaged. Moreover, it will allow surplus air to bypass the seals.
In case you observe a drop in engine idling whenever you exert braking pressure from an idle position, it implies that the brake booster should be replaced.
The Leakage of The Brake Fluid
In majority of the incidences, it is observed that the definite indication of a master cylinder working faulty is the existence of brake fluid leakage in the engine inlet or in the vehicle. This is mostly observed in the foot well.
When the leakage problem is more intense, the fluid could enter the floor of the vehicle on the driver’s part of the vehicle. You need to open up the cover and inspect the master cylinder.
In case you find no leaks inside the master cylinder, check for the fluid leakage problems in the foot well (located at the rear of vehicle’s brake pedal). In case there is a leak then you need to consider replacing the existing brake fluid.
Brakes Getting Softer or the Sinking Brake Pedal Issue
Occasionally, brake pedal existing in your vehicle may feel extremely soft or elastic. This might be an indication of a faulty master cylinder. Moreover, the soft brakes are due to the drips in the system.
It is observed that the push rod and included master cylinder come with rubber seals which might damage over the course of time. If such seals are not replaced timely, they may taint the brake fluid. During the worst situations, your vehicle’s brake pedal will immediately sink in the floor; it will not trigger the brakes itself. Actually, it is a serious symptom and it needs to be resolved at the earliest.
Irregular Clutch Pedal Behavior
Sometimes, it happens that you need to employ extra pressure on vehicle’s brake pedal. During such cases, there are chances that the master cylinder possesses the air within the structure, and the same leads to the fluid leakage problem.
Alternatively, if vehicle’s brake pedal is depressing on its own then it suggests that the heated brake fluid is unable to expand. Due to this, it will create additional pressure on the brake lines. A faulty brake master cylinder may lead to a situation in which pedal that feels soft or would gradually sink on the floor when released.
When you found any of these symptoms then it is certain that your brake booster or master cylinder is bad; the problem needs to be addressed at the soonest. Once you found out the fault, it is your responsibility to inspect the brake system of your vehicle and then take it to any nearest expert mechanics. You can also learn more about replacement costs for Bad Brake and Master Cylinder here.