Brake fluid and heat

Or high ambient temperatures affect the proper operation of the brake fluid? In principle no, but summer and autumn trips to and so for him exceptionally heavy burden. How to take care of your own safety?


You’re going fast road or a winding mountain road. Often you press the brake and after any event overwhelms you scary feeling that the foot every time goes deeper, and the car stops responding and does not release as if you wanted to? This is a typical situation related to the failure of the brake system.

(23-02-2017) It is worth noting also products of the highest quality, if the vehicle is used under severe conditions, taking into account the ambient temperature. Especially dangerous is the winter weather, as the oil to be able to fully protect the engine, must reach the right temperature. Only the best products can provide proper lubrication under severe frost.

where did the problem

Could be several reasons: leakage of fluid, brake system air or heating of the brake fluid. Leaking is usually physical damage to the cable, it is difficult to guard against it. Every time you review or replacement of tires let us ask a mechanic to check whether the brake lines are fine. But the heating of air to and are already our fault, consisting mainly of a lack of attention to the freshness of the brake fluid.

When you press the brake pedal, increasing the fluid pressure in the brake system – via a pump. The fluid reaches the piston and pushes against the discs by means of blocks. What here can ruin? Pads and discs replace when they become worn. A liquid? We should do normally every two years or every 40 thousand. km. Brake fluid is substantially incompressible and less prone to overheating. Fresh cooked only at temperatures above 250 ° C. The problem is that the most popular now fluids are hygroscopic – very readily absorb water, which dramatically reduces their efficiency. Suffice it to say that the limit is 3% of the water in the fluid. So a teaspoon of water in a liter of fluid makes them suitable only for disposal. Good new brake fluid has a boiling point approx. 260C. Only a percentage of water in the system reduces this value to approx. 185C, a 2% means that it must be replaced because the boiling point drops to 150-160˚C.

High temperatures

You have to remember that the discs and pads operate at very high temperatures – they can warm up above 500C and heat up the pistons and brake fluid. When it reaches boiling point, it begins to foam, releasing gas. Pressing the brake causes the compression of the gas in the brake system and has a negligible impact on the pads and discs. Auto simply ceases to brake.

As already mentioned, heat waves do not have the greater impact. But the vacation already so. Brake fluid easiest way to warm up while driving through the mountains, where we often have to slow down and the brakes do not have time to cool down. This is also true when traveling on congested roads, especially at higher speeds. And of course, when driving with a heavy load – when the car will pack the roof, which trunk, and behind us pulls a trailer.

From where water flows?

Liquid simply it attracts. It gets into the system through leaks expansion tank and pores in the rubber hoses. To “corruption” of fluid just the minimum amount of water, so do not remove the reservoir lid too often and be careful not to do it in the rain, fog, etc.

As you explore the brake fluid?

What counts above all color. Brake fluid as consumption loses color becomes a dirty gray. Besides its efficiency, we can examine the brake fluid tester. It’s not the very complicated device, costing 50 pounds. The average driver is not very necessary, because of the same costs … exchange the brake fluid. Let us remember: every two years or every 40 thousand. km.

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