Brake Repairs in Holland Park

Why fluid goes off

Brake fluid is hygroscopic. It pulls water out of the atmosphere through the reservoir cap and through the flexible hoses themselves, slowly and continuously, whether the car is driven or parked.

Water in the fluid lowers the boiling point. Fresh fluid might boil somewhere well above 200 degrees, and a few years of moisture can bring that down substantially. Brisbane humidity does not help.

What that feels like from the driver's seat

Nothing at all, until the brakes get hot. Then the water in the fluid turns to vapour, and vapour compresses in a way that liquid does not.

The pedal goes long or straight to the floor, and it comes back once things cool down. On a hill that is a genuinely frightening few seconds, and it is the classic symptom of fluid that should have been changed a couple of years ago.

The two year rule

Most manufacturers call for a brake fluid change every two years regardless of kilometres, because the clock is what degrades it rather than the driving. A car that does 5,000km a year needs it on the same schedule as one doing 25,000km.

We can test moisture content rather than going purely on the date, which tells you where the fluid actually is. If it comes back fine, we say so and you keep driving.

A flush replaces the fluid through every corner of the system, bleeding each caliper until clean fluid comes through. Doing the reservoir alone achieves very little, because the old fluid at the wheels is the fluid that gets hot.

Using the right fluid

Fluid is not generic. Vehicles specify a grade, and the manufacturer's figure printed on the reservoir cap is the one that goes back in. Mixing types or topping up with whatever is in the shed is how systems get into trouble.

Some vehicles also specify fluid the ABS unit is designed around, and getting that wrong can affect seals over time. We use what the maker calls for, and the product carries its supplier warranty like any other part we fit.

Holland Park hills and heat

Holland Park runs off Logan Road on the south east side, next to Tarragindi, Wellers Hill, Greenslopes and Mount Gravatt, and the local streets rise and fall a good deal more than the flat suburbs closer to the river.

Downhill running is where fluid gets tested. Holding a car back on a descent puts sustained heat into the pads and through the caliper into the fluid, rather than the short sharp heat of a single stop. That is the condition where degraded fluid shows itself.

Using a lower gear on a long descent takes load off the brakes, and it is worth doing on the steeper local streets. It does not replace fresh fluid though.

The parent brake repairs page covers pads, rotors and symptoms in full, and the rest of what we do locally is on the Holland Park page.

Fluid plus the rest of the system

Fluid rarely travels alone. While the wheels are off we measure pad material at each corner and rotor thickness against the stamped minimum, and check the flexible hoses that fluid moves through.

Hoses perish from the inside. A hose can look sound and still be swelling under pressure or acting as a one-way restriction that holds a brake on. That is worth catching when the fluid is being done rather than a year later.

We are at 2 Baldock St, Moorooka. Repairs are quoted before they happen. Contact us for current pricing.