Where Does Brake Fluid Usually Leak?
2 Answers
Brake fluid usually leaks at the connection points between the brake pump and the pipelines or the brake handle. Brake fluid, also known as hydraulic brake fluid or brake oil, is made from refined diesel distillate with thickeners and antioxidants. There are three types of brake fluid: mineral oil brake fluid, alcohol-based brake fluid, and synthetic brake fluid. Precautions for using brake fluid include: 1. Avoid mixing with gasoline or engine oil; 2. Replace it regularly; 3. Choose high-quality brake fluid. The characteristics of brake fluid are: 1. Low freezing point: It maintains good fluidity at low temperatures; 2. Extremely high boiling point: It does not form vapor locks at high temperatures; 3. Minimal quality changes: It does not corrode or soften metals and rubber.
I've been driving for several years, and brake fluid leaks are not uncommon. A common issue is the aging and cracking of the master cylinder's seals, located right below the fluid reservoir in the engine bay. Loose or corroded brake line connections are also hotspots, especially at the flexible hose joints. If the wheel cylinder pistons near the wheels are worn, fluid can seep out. The ABS module occasionally leaks too, so it's important to crouch down and check for oil stains under the car. Brake fluid leaks are dangerous as they reduce braking power, so timely topping up or part replacement is crucial. The simplest DIY check is to look for drip marks on the ground after the car has cooled down a bit post-driving. Safety first—don't underestimate this issue.
