17-03-2020, 01:25 AM
"Lastly the brake fluid - if like 99% of cars in the UK it was an ethylene glycol-based (DOT3 or 4) fluid, it is hygroscopic; which means it absorbs water from the atmosphere. Typically the uptake is about 1.5% by volume each year. After about the third year of service the absorption of water is enough to reduce the boiling point of the fluid to levels way below the rated specification (boiling point) of new fluid;"
It might be worth adding what the effect of boiling is - it produces bubbles of gas that, unlike liquid, can be compressed. The result is that your brake pedal can go down to the floor or has to be pumped to maintain any semblance of stopping power.
It might be worth adding what the effect of boiling is - it produces bubbles of gas that, unlike liquid, can be compressed. The result is that your brake pedal can go down to the floor or has to be pumped to maintain any semblance of stopping power.