Under repeated hard braking, this contaminated fluid can vaporize into steam, creating a spongy pedal feel known as brake fade—a dangerous condition where the brakes lose effectiveness. DOT 4: Also glycol-ether based but with borate additives, raising the minimum dry boiling point to 446°F (230°C).
Brake Oil DOT System Bleeding Guide: Step-by-Step Procedure
While this might sound harmless, it is a primary cause of brake system failure. 1: A high-performance glycol fluid that meets the standards of DOT 5 regarding boiling point but maintains the wet boiling characteristics of DOT 4, suitable for demanding applications.
It needs to maintain a stable viscosity across a wide temperature range, ensuring the fluid flows smoothly in freezing conditions yet does not vaporize under extreme heat generated during aggressive braking. Key Properties of Quality Fluid Not all liquids can perform the demanding job of brake fluid.
Brake Oil DOT System Bleeding Guide: Step-by-Step Procedure
Over time, the fluid absorbs moisture from the air through the microscopic pores in the brake lines and master cylinder reservoir. Furthermore, it must be non-compressible to provide consistent pedal feedback, and it requires specific additives to inhibit corrosion within the steel lines and cylinders of the braking circuit.
More About Brake oil dot
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