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By Mark Shively

Over time, non-synthetic or mineral brake fluids change chemically into a gel-like solid that obstructs and affects brake system passageways, grooves, and components.

If left untreated, the gel-like solid eventually changes chemically into a crystal-like substance. Once brake fluid reaches these latter stages, etching of the caliper’s and master/slave cylinder’s machined surfaces occurs.

The result is brake calipers that drag and overheat, levers that are slow or fail to return, poor braking efficiency, and complete brake system failure. Cleaning and restoring of these components to usable condition is possible, though replacement is recommended because brake fluid tends to accumulate in the etched recesses and the chemical change process may easily repeat in less time after cleaning.

After replacement or thorough component cleaning, the system will need to be bled.

Keep in mind that the manufacturer recommends replacing rubber brake hoses about every two years. See the periodic maintenance table in the Owner’s or Service Manual for exact details for your model.

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