Brake fluid plays a crucial role as it transfers the force created when a driver presses the brake pedal directly onto the wheel hub. Heat generated from braking may affect the brake fluid especially under heavier breaking or prolonged breaking. The brake fluid can only work if it is liquid and not so hot that it has become vapour.
The boiling point your brake fluid achieves is critical to efficient braking as temperatures above the boiling point can form vapour bubbles in the system. This can potentially lead to a failure in the brakes.
Brake fluid serves as a lubricant for all movable parts and prevents corrosion. It's important that the brake fluid is compatible with rubber seals and hoses therefore allowing braking systems to achieve long service and optimal performance.
Why does brake fluid deteriorate?
Brake fluid absorbs moisture through the pipes, hoses and joints that it lubricates. As the water content in the brake fluid increases, the temperature the liquid boils at lowers from when the brake fluid was first put into the vehicle. When you first buy brake fluid there’s no water content and as it circulates your vehicle it begins to get contaminated.
Water contamination can significantly reduce the boiling point below 5%!
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Volvo Cars Shrewsbury