Brake Fluid Problems

Brake fluid is the liquid used to transmit power from the automobile brake pedal to the brakes on each wheel. Problems sometimes compromise the ability of the brake fluid to do its job.

Water in the Brake Fluid

Over time brake fluid will absorb water from the atmosphere and this process can be accelerated if the fluid reservoir cap is not tightly sealed. Excessive water in the brake fluid will cause corrosion of brake components. It will also lower the brake fluid boiling point, possibly causing the fluid to boil in the brake cylinders during braking.

Grit and Metal Shavings in Brake Fluid

Over time small metal particles will wear off of the brake internal parts and these will accumulate in the fluid. This problem is accelerated if the brake fluid water content is excessive. Any such solid contamination will accelerate the wear of brake system components and could possibly form blockages in brake lines.

Use of Improper Brake Fluid

There are many different kinds of brake fluid. These are generally designated as DOT 3, DOT 4, and DOT 5. It is important to use the precise type of fluid specified by the vehicle manufacturer. In some cases, manufacturers will specify a fluid with special properties that exceed any of the normal Department of Transportation (DOT) designations. Use of improper fluid can cause deterioration of brake system seals and may result in fluid boiling during braking.