Will the brakes still become soft after replacing the brake master cylinder?
2 Answers
After replacing the brake master cylinder, if the brakes become soft, it indicates that air has entered the brake lines and needs to be promptly purged. Additional knowledge is as follows: 1. Sudden brake failure: When applying the brakes, if you feel a momentary loss of braking, check if the brake fluid is low. Then inspect the master cylinder, wheel cylinders, and brake lines for any signs of leakage. If there are leaks, it means the master cylinder or wheel cylinders are severely leaking and must be repaired immediately. Brake failure can have very dangerous consequences. 2. Brake pull: If the car pulls to one side when braking, it may be due to a swollen piston in the master cylinder or uneven brake wear. This issue must be addressed promptly because controlling the direction during a pull is difficult, especially in cars without ABS (Anti-lock Braking System), posing a significant hazard. 3. Brake pedal not returning or slow to return: If the brake pedal does not rise or offer resistance after being pressed, it indicates a non-returning brake pedal. In this case, check if the master cylinder or wheel cylinder components are damaged. This issue can also occur due to insufficient brake fluid or a fluid leak.
I've encountered this issue before. After replacing the brake master cylinder, I thought it was done, but the brake pedal still felt spongy. The problem might be due to incomplete bleeding. When replacing the pump, air can easily enter the system, and air bubbles trapped inside can cause the brakes to feel soft. I checked the brake fluid and found it wasn't fresh enough or had contaminants, so I immediately replaced it with new fluid. After bleeding the system, the brakes returned to normal. Spongy brakes are no small matter—they could also be related to worn calipers or leaking hoses. Before replacing the pump, always check the entire system for leaks. With over 20 years of driving experience, I've seen these small details often overlooked, resulting in compromised braking performance. Safe driving relies on good brakes, so if you encounter a similar issue, get it checked by a skilled technician right away—don't delay.
